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

BEST BUDS?

Conservative and chic in a slim-fitting RM by Roland Mouret dress, Lopez shows off her svelte figure alongside Victoria Beckham at the Marc Jacobs show during New York's Fashion Week in September. Lopez's post-baby body is the result of her hardcore new workout schedule: the new mom was training for the Nautica Malibu Triahtalon!