Following her surprising split from husband Russell Brand, Katy Perry's all over some other guy already! But don't worry — it's for charity. The soon-to-be-Simmed pop tart stepped out for 1 Oak's GiveLove charity event in Vegas on the arm of her friend (and the evening's co-host) Markus Molieri. She was, of course, rocking that blue 'do that doesn't seem at all to be a reflection of her current emotional state, judging by her smiles at the event.