Last night (Feb 19th), Cassie hosted her official ‘King Of Hearts’ release party at SL in New York City. Of course her fella Diddy was there, as well as several pals, who helped her to celebrate the release. Sadly, the song has been underperforming, slowly lingering up, down and around the #190-170′s on iTunes and not really moving. Still, Cassie looked very happy. After all, she’s now the number one chick (and possibly, the only chick left) on her boyfriend’s Bad Boy label.