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LAS VEGAS, NV - DECEMBER 02: (L-R) Carrie Underwood, Zac Brown and Seth MacFarlane perform onstage during "Sinatra 100: An All-Star GRAMMY Concert" celebrating the late Frank Sinatra's 100th birthday held at the Encore Theater at Wynn Las Vegas on December 2, 2015 in Las Vegas, Nevada. The show will air on CBS on December 6. (Photo by Michael Tran/FilmMagic)

LAS VEGAS, NV - DECEMBER 02:  (L-R) Carrie Underwood, Zac Brown and Seth MacFarlane perform onstage during "Sinatra 100: An All-Star GRAMMY Concert" celebrating the late Frank Sinatra's 100th birthday held at the Encore Theater at Wynn Las Vegas on December 2, 2015 in Las Vegas, Nevada. The show will air on CBS on December 6.  (Photo by Michael Tran/FilmMagic)