Katy Perry Hosts GiveLove Charity Event in Sin City

Making her first official public appearance since parting ways with ex-husband Russell Brand, Katy Perry played host at the 1 Oak At The Mirage grand opening in Las Vegas on Friday night (January 27).The newly-single "The One That Got Away" singer rocked a colorful blue coif as she was was joined at the soiree by J. Molinari jewelry designers Markus Molinari and Jason Arasheben, as well as