The Britney Spears Diet -- What's the Secret?!

Britney Spears shows off her toned tummy in a belly-baring top while out in Malibu on Friday. The pop princess was seen with a police escort, who paved the way to Starbucks for her.

Watch the video of Britney receiving a police escort into Starbucks here.

Brit sure does have something to smile about — her single “Gimme More” is #1 on iTunes in 12 different countries!