Katy Perry FLASHES Her ASS In Front Of Fans br br While performing in a tiny short red dress, the singer was seen gyrating on stageKaty Perry gave her fans a full view of her toned butt. Check it out. br br While performing in a tiny short red dress, the singer was seen gyrating on stage. br br Lady Gaga Shows Off Her Crotch To Audience, Katy Perry Lets A Fan Kiss And More. For more Hollywood news and gossip: ... br br Katy Perry performing at a concert when a fan gets a close up of her nice ass. br br Look, who forgot to wear her underpants? Katy perry. Yes the Fireworks singer dressed in a checked black skirt and yellow top exposed a little more than she ...