Bono appeared on Tuesday night's episode of Jimmy Kimmel Live! and performed a special duet with COLDPLAY's Chris Martin in support of Project (RED), the AIDS relief charity founded by the U2 frontman. The pair sang 'One For My Baby,' a song made popular by Frank Sinatra.

The stage was set to look like a bar, and Oscar-winner Sean Penn served as "bartender." The clip was mostly shot in black-and-white, with special effects that gave Bono's martini glass a pop of red. Midway through, Martin appeared at a red piano and helped bring the song home as the world around him bloomed in color.

(RED) is offering a variety of celebrity experiences bids as low as $10, including the chance to play miniature golf with Bono. On Kimmel's show, Bono explained that he swore never to play the game in his youth.