Top 7 Craziest Letterman Guests

With all of Hollywood wondering if Joaquin Phoenix is just channeling Andy Kaufman in some sort of weird hoax or if he really has gone off the deep end, we thought it was a good time to look back at some of the crazier Letterman appearances.

#7 Drew Barrymore

#6 Madonna (Part 1)

Madonna (Part 2)

#5 Farrah Fawcett Part 1

Farrah Fawcett Part 2

#4 Joaquin Phoenix

#3 Harvey Pekar

#2 Crispin Glover

#1 Andy Kaufman and Jerry Lawler