Adam Levine & John Legend Couple Up At Sinatra 100 All-Star Grammy Concert!

Adam Levine keeps close to his wife Behati Prinsloo while posing backstage at the Sinatra 100: An All-Star GRAMMY Concert held at the Encore Theater at Wynn Las Vegas on Wednesday (December 2) in Las Vegas.

The 36-year-old singer and Behati, 26, were joined by pregnant Chrissy Teigen and her hubby John Legend, Jeremy Renner, Carrie Underwood, Alicia Keys, Usher, Katharine McPhee, Celine Dion, Zac Brown, Tony Bennett, Harry Connick Jr. and Seth MacFarlane.

PHOTOS: Check out the latest pics of Adam Levine

The Sinatra 100: An All-Star GRAMMY Concert celebrating the late Frank Sinatra‘s 100th birthday will air on CBS on December 6 on 9pm EST!

FYI: Chrissy is wearing a Julien Macdonald dress.

20+ pictures inside of Adam Levine, Behati Prinsloo and others at the concert event…