See The Voice coaches in an exclusive Rat Pack-inspired music video

The boys, Adam Levine and Blake Shelton, combine their voices on a duet of Frank Sinatra’s “Fly Me to the Moon” — and share some of their classic bromance banter — before they’re joined by Kelly Clarkson and Alicia Keys singing “Feelin’ Good” by Nina Simone.

This is Kelly Clarkson’s first season as a full-time coach, and Keys’s third — although she skipped the show’s 13th season. Both Levine and Shelton have been with the show from the beginning.