Beyonce, Rihanna, Alicia Keys, Ashlee Simpson and Nicole Richie celebrate the 50th anniversary of the awards.
Multiple nominee Beyonce changed from the Elie Saab gown she wore to walk the red carpet into a beaded chartreuse jacket and sequinned hot pants by Giorgio Armani Prive for the first of her two performances.
See more Beyonce
Rihanna talks fashion exclusively with In Style in honour of the Grammys
Check out the full list of winners at grammy.com
Armani