Credit: Celebrity Photo; Broadimage; Getty Images

The Grammys are known for standout fashion moments, and tonight was no different! Taylor Swift (in J. Mendel), Alicia Keys, and Rihanna (both in Azzedine Alaïa) all hit high notes on the red carpet in peek-a-boo back-baring designs. And that wasn't the only trend we spotted! Click through the gallery to see more of the night's fashion moments.