Video! Katy Perry at 1 OAK Las Vegas
Singer Katy Perry stepped out for the Grand Opening weekend of 1 OAK Las Vegas at The Mirage to support the GiveLove Charity with J. Molinari Jewelry designers Markus Molinari and Jason Arasheben.
The "Teenage Dream" singer helped present a check to the charity's co-founders, Patricia Arquette and Rosetta Getty and board-member David Arquette.
Check out all the video from the big event!