Crazy for Crop Tops

The hot new accessory in Hollywood? Apparently it's abs. And if you've got 'em (which Selena Gomez, Diane Kruger and these other stars certainly do), there's no reason not to flaunt 'em in a short shirt. Now excuse us while we do 100 sit-ups...

RIHANNA

It doesn't seem accurate to say Rihanna is "jumping on board" with the crop top trend considering she's never been one for covering up her torso, whether she's performing, grabbing a pizza or attending a fashion show.