Russell Brand Who?! Katy Perry Has A New Man On Her Arm! (PHOTOS)

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Katy Perry and Markus Molinariat

Katy Perry kept her bestie Markus close as she made her first post divorce appearance.

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Russell Brand who?

Katy Perry made her first official appearance since her divorce last night and the pop diva looked as happy as a clam.

Katy played hostess and showed off her blue hair at the 1 Oak At The Mirage grand opening in Las Vegas.

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The Fireworks singer posed with one of her besties, Markus Molinariat who never left her side.

Katy appeared to be all smiles full of laughs and having a good time.

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The event was tied to the charity GiveLove.Org and the star tweeted her great appreciation saying "Thanks to everyone who helped out w/ (with) the Give Love event at Mirage & 1 Oak LV. Go to Givelove.org to see how u can make a difference!"

It's good to see Katy is keeping busy and supporting a good cause. We wonder what Russell Brand is up to?

Check out her and her bestie working the red carpet for a good cause in the gallery above.