Christina Milian

Word is Island Def Jam dropped Christina Milian, after her third album, "So Amazin,' " was less than amazin' in sales. The heavily hyped album sold a meager 50,000 units ? in the week after its May 16 release. Sources say Island Def Jam gave her a promotional budget worthy of Mariah Carey.

Adding insult to injury, I herd Vibe magazine canceled Milian's scheduled August cover, after Island Def Jam informed the mag that she's toast ? and replaced her with R&B singer Keyshia Cole.

I?m told that Milian passed on recording "S.O.S. (Rescue Me)," which ended up becoming a hit single for her label mate Rihanna ? whose record, "Girl Like Me," sold 115,000 copies in its first week.

Rumor is execs at Island Def Jam are blaming Milian's boyfriend and executive producer, Marcello (Dre) Valenzano, of the production team Cool & Dre, for the artist's alleged lack of cooperation.

Milian's PR rep confirmed the split with the record label, but tried to give it a sweet sound: "Christina Milian and Island Def Jam have decided to end their relationship due to creative differences. This was a mutual decision."

Island Def Jam had no comment.