Beastie Boys

Like other most 20th century celebrities, the Beastie Boys are heads in jars.

Trivia

 * Adam "MCA" Yauch was unavailable at the time of the recording so only Adam "King Adrock" Horovitz and Michael "Mike D" Diamond voice themselves in the episode with Horovitz also voicing Yauch.
 * The Beastie Boys are also employed as a method of torture for Bender in Robot Hell (they scratch his hard drive like a record).