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

MEET EMME & MAX

Naming her twins Emme and Max, Lopez and Anthony welcome the twosome on Feb. 22, 2008. The twins are a month old when they make their debut on the cover of PEOPLE. "I knew I'd be protective. I knew I'd love them intensely and passionately," Lopez tells PEOPLE.