Some of the most eagerly-awaited 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 debut rock and roll album, Rebirth.

Memoirs, which was first slated for an August 25 release via Island Def Jam, will now be available September 15. According to the Universal Music Group website, Carey’s new single, “Obsessed,” is at No. 11 on the Billboard Hot 100 this week.

A new date has not yet been scheduled for Rebirth. In an interview with MTV News last week, Diddy confessed that he was pushing back his album’s release to avoid competition with hip-hop heavyweights Jay-Z and Drake.