Alec Baldwin -- doing his legendary Bennett impersonation in full prosthetic makeup -- was the unofficial emcee of the evening, which was filled with performances by the likes of Stevie Wonder, Bob Dylan, Michael Buble, and many others.

Lady Gaga, who collaborated with Bennett on a 2014 duets album, Cheek to Cheek, kicked the evening off with a flawless cover of Frank Sinatra's famous hit "The Lady is a Tramp."