Brit's Real Diet Secret? Stay 21 ... For Five Years!

4/2/2008 4:50 PM PDT
You thought Brit looked awfully svelte on the cover of this week's OK! magazine, didn't ya? It's the one that screams, "Britney Lost 15 Lbs in Just 4 Weeks!"

Turns out it was taken back in 2003 for a Glamour magazine photo shoot, ancient history in Britwreck time. So she probably was 15 pounds lighter ... but that was well over four years ago.