There's no better time to appreciate standout red carpet gowns than during Fashion Week. We're already in the right frame of mind to digest daring trends and bold silhouettes. The Grammys is the perfect ceremony for celebrities to test the limits. Before singers like Katy Perry, Rihanna, and Lady Gaga changed into their performance costumes, we rounded up their arrival outfits. And frankly, they might be just as buzzy. Ahead, see what everyone wore, then check out their stunning beauty looks and vote on the best dressed!