J.Lo at 40: How a Diva Was Made!

In 40 photos, see how the birthday girl (on July 24) went from Jenny from the Block to superstar

STEAMY ROLE

She stars as a U.S. marshal opposite robber-on-the-run George Clooney in 1998's sexy drama Out of Sight – and the movie goes on to score an Oscar nomination. "You have to believe she could pick up a gun and shoot you, and you still have to want to chase her around the couch," Clooney says of Lopez's performance.