In a desperate attempt to steal back some of the spotlight from the vastly more talented Lady Gaga, Katy Perry decided to flash her crotch on stage. The move comes as no surprise to music industry insiders who have watched Katy Perry’s once promising career nose dive over the past 2 years. Katy Perry measurements, bra size, weight, height, cup size, and more about her hot body in Does she have breast implants? Katy Perry and Calvin Harris have had a very public bust-up over Twitter after the Flashback star pulled out of her UK shows. Calvin was scheduled to open for Katy’s gigs but cancelled at the last minute after being angered over set arrangements. The furious I Kissed A Girl singer vented on.