delivered the opinion of the court:
Pursuant to a fully negotiated plea agreement, the trial court found the defendant, Hershel Morgan, guilty of, among other things, four counts of home invasion (720 ILCS 5/12 — 11(a) (West 2004)). The court sentenced the defendant to four concurrent 30-year prison terms for these offenses. On appeal, the defendant argues that three of his home invasion convictions and sentences should be vacated under one-act, one-crime principles. We agree, and accordingly, we vacate three of the defendant’s convictions and sentences for home invasion.
I. BACKGROUND
The State charged the defendant with having committed seven offenses on December 20, 2005. The State alleged that the defendant committed four counts of home invasion by entering a residence in Tazewell County and: (1) threatening K.M. with a knife; (2) threatening Corey Buhs with a knife; (3) committing aggravated criminal sexual assault against K.M. by placing his penis in her mouth; and (4) committing aggravated criminal sexual assault against K.M. by placing his penis in her vagina. He was also charged with having committed two counts of aggravated criminal sexual assault, as described above. Additionally, the State submitted that the defendant committed a residential burglary during the incident.
The defendant agreed to plead guilty to these seven offenses in exchange for the State: (1) recommending specific sentences; (2) agreeing not to charge the defendant for other offenses in Tazewell County that were under investigation; and (3) dismissing a felony charge in Peoria County. After the State presented the factual basis for the seven counts, the court accepted the defendant’s guilty plea and the terms of the negotiated agreement. The court sentenced the defendant to: (1) two consecutive 221/2-year prison terms for the sexual assault offenses; (2) four concurrent 30-year prison terms for the home invasion offenses; and (3) 15 years of imprisonment for the burglary offense. The sentences for the home invasion and burglary offenses were to run concurrently both with each other and with the two consecutive sentences.
*773The defendant filed a timely motion to withdraw the guilty plea in which he did not specifically argue that three of his home invasion convictions and sentences should be vacated under one-act, one-crime principles. During the hearing on the motion, the defendant also did not explicitly raise this argument. The trial court denied the motion, and the defendant appealed.
II. ANALYSIS
A. One-act, One-crime
The defendant contends that we should vacate three of his home invasion convictions and sentences under one-act, one-crime principles, pursuant to which more than one offense may not be carved out of a single physical act. See People v. King, 66 Ill. 2d 551, 363 N.E.2d 838 (1977). The Illinois Supreme Court has repeatedly held that, under one-act, one-crime principles, the home invasion statute will support only a single conviction for a single entry to a residence, regardless of the number of persons present or the number of persons harmed by the defendant. See People v. Hicks, 181 Ill. 2d 541, 693 N.E.2d 373 (1998); People v. Cole, 172 Ill. 2d 85, 665 N.E.2d 1275 (1996); People v. Sims, 167 Ill. 2d 483, 658 N.E.2d 413 (1995). In other words, according to our supreme court, the home invasion statute (720 ILCS 5/12— 11(a) (West 2004)) does not authorize multiple convictions for a single entry to a home.
The State does not challenge the fact that this is the law of Illinois and does not deny that the defendant only made a single entry to the residence. Rather, the State questions our authority to correct the error of the defendant’s multiple convictions on appeal. The State submits that the defendant has forfeited or waived this argument both by: (1) failing to raise it in the trial court; and (2) pleading guilty to the offenses.
B. Forfeiture or Waiver
1. Failure to Raise the Issue in the Trial Court
In the instant case, the defendant did not argue in the trial court that three of his home invasion convictions should be vacated under one-act, one-crime principles. We will consider whether we may reach the defendant’s argument despite his failure to raise it with the trial court. Generally, a defendant’s argument is forfeited on appeal if it was not raised in the trial court. People v. Enoch, 122 Ill. 2d 176, 522 N.E.2d 1124 (1988). In this case, the defendant failed to raise his one-act, one-crime argument in the trial court. Therefore, it is forfeited on appeal.
Although the defendant’s one-act, one-crime issue is forfeited, *774plain errors affecting substantial rights may be reviewed by an appellate court despite forfeiture. 134 Ill. 2d R. 615(a). The plain error doctrine allows a reviewing court to consider errors affecting a defendant’s substantial rights if either: (1) the evidence was closely balanced; or (2) the error was so serious that it affects the integrity of the judicial process. People v. Herron, 215 Ill. 2d 167, 830 N.E.2d 467 (2005).
In the instant case, our consideration of the closeness of the evidence is inapplicable because the defendant was convicted following a guilty plea. Because the defendant’s convictions resulted from a plea proceeding rather than a trial, the State offered a factual basis for the plea rather than evidence per se. However, we will analyze whether the erroneous imposition of multiple home invasion convictions was so serious that it may affect the integrity of the judicial process. See Herron, 215 Ill. 2d 167, 830 N.E.2d 467.
In Hicks, 181 Ill. 2d at 545, 693 N.E.2d at 375, the Illinois Supreme Court ruled that the question of whether the defendant could be convicted of two home invasions overcame waiver (forfeiture) under the goals of obtaining a just result and maintaining a sound body of precedent. Likewise, in People v. Lee, 213 Ill. 2d 218, 226, 821 N.E.2d 307, 312 (2004), our supreme court stated that the defendant’s one-act, one-crime argument was not barred on appeal by failing to raise it in the trial court. Citing People v. Harvey, 211 Ill. 2d 368, 813 N.E.2d 181 (2004), the Lee court said that a one-act, one-crime violation affects the integrity of the judicial process and, therefore, invokes the plain error rule. See Lee, 213 Ill. 2d at 226, 821 N.E.2d at 312. In this case, under Hicks, Harvey, and Lee, we are authorized to consider the defendant’s one-act, one-crime argument for plain error.
Additionally, we may analyze the defendant’s one-act, one-crime argument for plain error because it implicates constitutional double jeopardy principles. The double jeopardy clause of the United States Constitution provides that no person shall “be subject for the same of-fence to be twice put in jeopardy of life or limb” and is applicable to the states through the fourteenth amendment. U.S. Const., amends. V XIV The Illinois Constitution similarly states that “[n]o person shall *** be twice put in jeopardy for the same offense.” Ill. Const. 1970, art. I, §10.
The constitutional prohibition against double jeopardy bars three specific governmental actions, which are: (1) prosecution for the identical offense after an acquittal; (2) prosecution for the identical offense after a conviction; and (3) the imposition of more than one punishment for the same offense. People v. Gray, 214 Ill. 2d 1, 6, 823 N.E.2d 555, 558 (2005). The one-act, one-crime rule is used to enforce the *775third prohibition of double jeopardy, which is that a person should not suffer multiple punishments for the same act. People v. Price, 369 Ill. App. 3d 395, 404, 867 N.E.2d 972, 980 (2006). Therefore, the defendant’s one-act, one-crime issue is a type of double jeopardy argument.
“ ‘[T]he seriousness of a double jeopardy issue and the [intimate] relationship of the issue to the integrity and fairness of judicial proceedings warrant considering the issue as plain error.’ ” People v. Billops, 125 Ill. App. 3d 483, 485, 466 N.E.2d 304, 306 (1984), quoting People v. Valentine, 122 Ill. App. 3d 782, 784, 461 N.E.2d 1388, 1389 (1984).1 Therefore, based on Billops, we may reach the defendant’s one-act, one-crime issue, as a form of double jeopardy argument, under the second aspect of the plain error doctrine.
Additionally, we note that the concurrent sentences for the defendant’s four home invasion convictions raise double jeopardy considerations. Even though the defendant would not serve additional prison time for his three excess convictions, such additional sentences are forbidden because of their potential for adverse collateral consequences. See Rutledge v. United States, 517 U.S. 292, 302, 134 L. Ed. 2d 419, 429, 116 S. Ct. 1241, 1248 (1996). These consequences may include: (1) the defendant’s eligibility for parole; (2) an increased sentence under a recidivist statute for a future offense; (3) impeachment of the defendant’s testimony in a future trial; and (4) the societal stigma accompanying any criminal conviction. Ball v. United States, 470 U.S. 856, 84 L. Ed. 2d 740, 105 S. Ct. 1668 (1985). Additionally, the excess sentences may affect the setting of bond, if the defendant has a future encounter with the criminal justice system. People v. Davis, 156 Ill. 2d 149, 160, 619 N.E.2d 750, 756 (1993). Thus, we also should consider the defendant’s one-act, one-crime argument because, under double jeopardy principles, there are potential adverse collateral consequences to his excess concurrent convictions. Such potential adverse collateral consequences certainly concern the integrity of the judicial process and, therefore, implicate the plain error rule.
2. Guilty Plea
The State contends that the defendant has waived or forfeited his one-act, one-crime argument by entering a guilty plea. The State cites People v. Jackson, 199 Ill. 2d 286, 769 N.E.2d 21 (2002), for the proposition that when a defendant voluntarily pleads guilty, he waives all *776nonjurisdictional errors or irregularities. We would note, however, that it has been said, “[ujnless there is plain error, a voluntary guilty plea waives all non-jurisdictional errors including violations of constitutional rights.” Billops, 125 Ill. App. 3d at 484, 466 N.E.2d at 305. In this case, we have found plain error implicated.
As a preliminary matter, we note that in People v. Blair, 215 Ill. 2d 427, 443, 831 N.E.2d 604, 615 (2005), the Illinois Supreme Court observed that Illinois law has tended to use the terms “waiver” and “forfeiture” interchangeably. The Blair court, however, pointed out important distinctions between these two terms, when used correctly. “Waiver” means the voluntary relinquishment of a known right. Blair, 215 Ill. 2d at 444 n.2, 831 N.E.2d at 615 n.2. “Forfeiture” is defined as the failure to raise an issue in a timely manner, thereby barring its consideration on appeal. Blair, 215 Ill. 2d at 444, 831 N.E.2d at 615.
In People v. Townsell, 209 Ill. 2d 543, 547-48, 809 N.E.2d 103, 105 (2004), our supreme court explained that by pleading guilty, a defendant “waives” nonjurisdictional errors, in the sense of voluntarily relinquishing known rights. The Townsell court emphasized that the term “waiver,” as used in cases regarding Supreme Court Rule 615(a) (134 Ill. 2d R. 615(a)) concerning plain error, has nothing to do with the voluntary relinquishment of known rights. To the contrary, according to the Townsell court, the term “waiver,” as applied to Rule 615(a), concerns failure to bring an issue to the attention of the trial court. Although the Townsell court did not explicitly say so, the term “waiver,” in the plain error context, actually means “forfeiture.”
The Townsell court, therefore, noted that the “waiver” referred to in Jackson, regarding guilty pleas, concerned the voluntary relinquishment of a known right rather than the failure to raise an issue in the trial court. Townsell, 209 Ill. 2d at 547, 809 N.E.2d at 105. The courts in both Townsell and Jackson ruled that the defendants voluntarily relinquished a known due process right concerning an Apprendi sentencing issue by pleading guilty.
However, we cannot assume the present defendant voluntarily and knowingly pled guilty to improper excess convictions, without something in the record suggesting that he voluntarily relinquished a known right by agreeing to these impermissible excess convictions. Therefore, we cannot say that the defendant “waived” his one-act, one-crime argument by pleading guilty.
The State also cites People v. Peeples, 155 Ill. 2d 422, 616 N.E.2d 294 (1993), for the proposition that a constitutional right, like any other right of a defendant, may be waived. Again, we note that the term “waived,” as used in Peeples, concerns the voluntary relinquishment of a known right. In Peeples, the court ruled that the defendant *777voluntarily relinquished his known right to a fair and impartial jury concerning a Batson issue by pleading guilty. Thus, Peeples is inapplicable to the present case for the same reason that Jackson is inapposite.
Additionally, the State contends that the defendant is estopped from making his current argument under the contract theory of plea agreements announced by the Illinois Supreme Court in People v. Evans, 174 Ill. 2d 320, 673 N.E.2d 244 (1996). However, we find Evans to be procedurally and factually distinguishable from the present case. In Evans, the defendants were convicted and sentenced pursuant to negotiated pleas. They then filed motions to reduce their sentences. Using contract analysis, the Evans court held that defendants who enter into negotiated pleas must move to withdraw their guilty pleas, rather than move to reduce their sentences. In this case, the defendant did not negotiate a plea and then seek to reduce his sentence. On the contrary, the State negotiated a plea with the defendant, which included improper excess home invasion convictions. Arguably, these negotiations violated contract principles of good faith and fair dealing, absent a showing in the record that the defendant knew the three convictions at issue would be impermissible excess convictions. But, whatever the situation, in the instant case, the defendant properly preserved his right to appeal by filing a motion to withdraw the guilty plea, rather than a motion to reduce the sentence. Therefore, because the present case is procedurally and factually distinguishable from Evans, we find the contract analysis of Evans to be inapplicable.
C. Summary
The State does not contest that three of the defendant’s convictions for home invasion violate one-act, one-crime principles because the defendant made a single entry to the residence. Instead, the State argues that we may not reach this issue on appeal. Neither party argues that the matter should be remanded. We hold that we may consider the question on review, for the reasons stated above, and consequently vacate three of the defendant’s home invasion convictions. See Hicks, 181 Ill. 2d 541, 693 N.E.2d 373; Cole, 172 Ill. 2d 85, 665 N.E.2d 1275; Sims, 167 Ill. 2d 483, 658 N.E.2d 413.
III. CONCLUSION
For the foregoing reasons, we vacate three of the defendant’s convictions and sentences for home invasion imposed by the Tazewell County circuit court.
Vacated in part.
O’BRIEN, J. concurs.