The Simpsons took the Hollywood Bowl for a concert of Springfield's favorite musical numbers.

Conan O'Brien talked about his time on the Simpsons as a writer, and the one episode that will forever haunt him.  Jon Lovitz showed up to belt out famous tunes, and you can watch every one of the Simpsons musical moments below.

O'Brien also paid tribute to the song's original performer Phil Hartman, as would Jon Lovitz in singing a bit from "Stop the Planet of the Apes, I Want to Get Off!," along with several others.

Michael Jackson impersonator Kip Lennon drops by to perform "Lisa It's Your Birthday". Plus, Hank Azaria, needing the Kwik-E-Mart!

You can check out the assembled collection of 'Simpsons' performance below, and let us know your favorite classic Simpsons song in the comments below.