Beyonce

Este Haim, from left, Danielle Haim, and Alana Haim of Haim

Keb' Mo' arrives at the 57th annual Grammy Awards at the Staples Center in Los Angeles

Katy Perry

Rihanna

Madonna.

Sia, right, and Maddie Ziegler

Blake Shelton, left, and Miranda Lambert

Taylor Swift

Johnny Mathis

Gwen Stefani

Annie Lennox

John Mayer

Barry Gibb

Helen Lasichanh, left, and Pharrell Williams

Brandy Clark

Vaja

Keltie Knight

John Waters

Nick Jonas, left, and Olivia Culpo

Nicki Minaj

Nancy O'Dell

The members of Mastodon, from let: Troy Sanders, Brann Dailor, Brent Hinds and Bill Kelliher.

Kelly Osbourne.

David Burtka, left, and Neil Patrick Harris

Chrissy Teigen, left, and John Legend.

Usher

Toni Braxton

Nicole Kidman and Keith Urban

Lady Gaga

Iggy Azalea

Mary J. Blige