Bow DownAll of Your Favorite Stars Stun on the Grammys Red Carpet

There are many reasons to love the Grammys. We get to see all of our favorite artists together under one roof, there are amazing once-in-a-lifetime performances (Rihanna, Kanye, and Sir Paul together on one stage!) and, last but certainly not least, it gives us some of the year's coolest red carpet looks. On music's biggest night, the stars pull out all the stops, and they're not afraid to take a few risks. From Charlie XCX's '80s-inspired Moschino tux to Rihanna's fresh-from-the-runway Giambattista Valli couture number, we've rounded up our favorite looks from the evening. Warning: serious fashion envy ahead.