Celebs' Coolest Summer Jobs

Jessica Simpson launches a jeans line! Madonna designs and directs! Plus: Who ran for office and more star gigs

SELLING OUT ARENAS

While most 16-year-olds spend their summer cramming for the SATs, Justin Bieber performs for thousands of fans during his first major headlining tour in Trenton, N.J. "Thank you to all the fans that came and SCREAMED!" he Tweeted. "I love u ladies."