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


No stage fright here! Katie Holmes stands front and center at New York's Gerald Schoenfeld Theatre on Thursday, where she made her Broadway debut in Arthur Miller's All My Sons. Proudly cheering her on in the audience? Husband Tom Cruise, who told PEOPLE, "I'm so proud of her."

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