The two-hour special Tony Bennett Celebrates 90 aired Tuesday, Dec. 20. Bennett, 90, has had an incredible life, and the special has aired an appropriately epic roster of guests to help him celebrate from Lady Gaga and Alec Baldwin to Bruce Willis and Stevie Wonder. (Bennett actually celebrated the milestone on Aug. 3, and the special taped Sept. 15 at Manhattan’s Radio City Music Hall.) Take a look back through an American icon’s life with this gallery.