Star Tracks
Duff performs her hit single on the Today show summer concert stage. Plus: Britney Spears, Tom Cruise and more
More from PEOPLE
SAY, 'CHEESE!'
British pop star Lily Allen puts on a happy face while arriving at a London studio on Thursday. But it was no laughing matter earlier that day: the "Smile" singer was arrested on charges of punching a paparazzo in March.
