Several albums delayed this summer

Mariah Carey, Diddy, Lil Wayne projects rescheduled

Some of the most highly anticipated albums of the summer have been delayed, including Mariah Carey's "Memoirs of an Imperfect Angel," Sean "Diddy" Combs' "Last Train to Paris" and Lil Wayne's rock-and-roll album "Rebirth."

Carey's "Memoirs," first slated for an Aug. 25 release via Island Def Jam will now be available on Sept. 15 according to the Universal Music Group business-to-business Web site. Carey's new single, "Obsessed," is at No. 11 on the Billboard Hot 100 this week.

Combs said via a video interview with MTV News last week that his project's been delayed partially because it's "Jay-Z time and Drake time -- enjoy those guys. But the 'Train' is coming, baby," he said. "Get your ticket; you don't want to be left out."

Lil Wayne's label publicist confirmed to that his release date has also been moved, although a new date hasn't been scheduled yet. "Rebirth" was last slated for a June 23 street date.

In addition, Amerie's long-awaited return, "In Love & War," which was originally slated for an Aug. 11 release, will now be available Sept. 8. Lead single, "Why R U," reached No. 62 on the Hot R&B/Hip-Hop Songs chart this week.