HOT GALLERY: Britney Spears' Behind Could Use a Belt!

Now you see her backside, now you don't! Britney Spears' sweatpants played a bit of a game of peek-a-boo on Friday as the pop princess hopped in and out of her car at a gas station in Westwood, Calif., showing quite a bit of the performer's behind in the process!

Brit was on her way to a meeting when the slip-up occurred, so we hope she got those loose pants picked back up by the time she arrived!

OK! EXCLUSIVE: A RARE REUNION FOR THE SPEARS SISTERS

Even if the fate of her falling down pants is uncertain, one thing's for sure — whether it's heading to a meeting or to McDonald's, Britney always rides in style!

OK! HOT GALLERY: BRITNEY & JASON'S VALENTINE'S DAY DATE AT MCDONALD'S