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!

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