Madonna and Diplo attend The 57th Annual GRAMMY Award (Getty Images)
Beyonce attends The 57th Annual GRAMMY Awards. (Getty Images)
Nicki Minaj (AFP)
Katy Perry (AP)
Kanye West and Kim Kardashian (Reuters)
Lady Gaga (AFP)
Rita Ora (AP)
Gwen Stefani (AFP)
Miley Cyrus (AFP)
Taylor Swift (AFP)
Rihanna (AP)
(AFP)
Rihanna and Katy Perry (Getty Images)
Ariana Grande (AFP)
Big Sean and Ariana Grande (AFP)
Jennifer Hudson (AFP)
Jessie J (Getty Images)
Brad Goreski, Giuliana Rancic, Kelly Osbourne and Ross Mathews (Getty Images)