Posted by Sabrina B. @gametimegirl

Justin Bieber knocked out Ultimate Fighting Championship head Dana White’s Twitter feed while fighter Dominick Cruz was taking down Urijah Faber in front of a star-studded crowd at UFC 132 in Las Vegas on the weekend, the New York Post reported Tuesday.

When Bieber, who was in the house at the MGM Grand Garden Arena, sent out a series of tweets that he was “chillin'” with White, the UFC kingpin’s feed got so much traffic from Bieber’s fans that his BlackBerry crashed and his account went silent for the rest of Saturday night.

The day before the pop artist was in Bridgehampton, NY, where he went on a shopping spree at Flying Point Surf Shop with girlfriend Selena Gomez.

“They pulled up in a black Escalade, picked out some items, then went into the dressing room,” a source said. “Justin bought two Obey hats, a T-shirt, board shorts and black Toms Shoes. Selena picked out a ViX bikini, a Free People dress and a pair of Toms pinstripe wedges.”

Bieber paid for everything and also bought his security guard board shorts and a T-shirt.

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