The singer suits up to promote B'Day. Plus: Lindsay Lohan, Sienna Miller and more

HIS KIND OF TOWN

Chicago is Usher's kind of town: The R&B singer – who just signed on to play toe-tapping lawyer Billy Flynn in the long-running Broadway musical – gives his endorsement at a Thursday performance of the show in New York City. "Being on Broadway allows you to connect to audiences in a whole new way," says the five-time Grammy winner, who begins his run Aug. 22.