The Grammy Awards are always full of surprises. However, when the stars began showing up on the red carpet, the disappointment of Rihanna canceling her performance last-minute was quickly forgotten. Lady Gaga stole the spotlight with her tribute to the late David Bowie - and so did Zendaya! If you missed the moments when Adele's sound got cut, the cast of Hamilton brought down the house, and the adorableness of Justin Bieber's little bro, click through to catch up via Instagram.