Who was Conan on The Simpsons?

Conan O'Brien was a guest star on The Simpsons! He played himself in the episode "The Last Temptation of Krusty," which aired in 1998.

In the episode, Krusty the Clown starts having religious visions after a bad acid trip. Conan is one of the people Krusty sees in his vision as a "false idol."