Yada, yada, yada, this is how you celebrate an anniversary.
Back in 2000, Julia Louis-Dreyfus and Jerry Seinfeld had a mini "Seinfeld" reunion when they met up on "Late Show" to perform a song from "The Sound of Music." CBS just posted the throwback clip in honor of the "Seinfeld" 25th anniversary, not that there's anything wrong with that because it's totally bringing us serenity now.
"Late Show with David Letterman" airs weeknights at 11:35 p.m. ET on CBS.