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

HAPPILY EVER AFTER

A beaming Lopez brings Max and Emme onstage during Anthony's Valentine's Day show at Madison Square Garden in 2009. A week later, the couple celebrate the twins' first birthday with a backyard barbecue. "I've been very career-oriented my whole life and very focused on my own world and my own life, and all of a sudden the focus just shifts," Lopez told PEOPLE earlier. "It's like, 'Whoosh!' I want to do everything for them."