STAGE TUBE: Seinfeld and Louis-Dreyfus Sing SOUND OF MUSIC

Back in 2000, SEINFELD's Julia Louis-Dreyfus appeared on The Letterman Show for an interview and performance. She was joined on stage by Jerry Seinfeld, and the two sang an adorably ironic version of "I am Sixteen Going on Seventeen," from The Sound of Music.

To celebrate the 25th anniversary of SEINFELD's premiere, watch this throwback clip!

SEINFELD ran for 9 seasons, ending in 1998. Starring Jerry Seinfeld, Julia Louis Dreyfus, Jason Alexander, and Michael Richards, the show is described as, "The continuing misadventures of neurotic New York stand-up comedian Jerry Seinfeld and his equally neurotic New York friends."