Aubrey O’Day’s been robbed!

The outspoken singing star — formerly of Diddy’s all-girl supergroup Danity Kane –was mugged while walking down an alleyway in Downtown Los Angeles this afternoon, according to her publicist.

Aubrey, 25, was on her way to tape a promo for The TV Guide Channel when an unidentified culprit approached her from behind and “stole everything she was holding” — including an expensive Zac Posen dress.

Luckily Aubrey and her teacup Maltese, Ginger, escaped without injury.

The thief is still at large.