The chart-topping singer hits the stage for a good cause in Las Vegas. Plus: Usher, Katie Holmes, Lauren Conrad and more

THRILL SEEKER

Unlike her runway neighbor, Pamela Anderson has no reason to cover up while taking in the action Thursday at the Vivienne Westwood Red Label show at London's Earls Court. The show also brought out Mischa Barton and Emma Watson (not pictured).



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