Diddy + Cassie Split

Rap mogul Sean 'Diddy' Combs and singer Cassie have split up.

The pretty R+B star, 21, was asked to confirm reports she and Combs were no longer an item as she left a friend's birthday party in New York on Wednesday.

She said, "I will confirm that rumor."

But a partygoer tells America's Us Weekly magazine Cassie and Combs were spotted "slipping out" together after the bash.