Mike D

Michael Louis Diamond, known on stage as Mike D, is an American rapper, singer, and drummer with the rap trio the, who provided the voice of his own head in a jar in "Hell Is Other Robots". Beginning his career in the scene, in 1981 he and Adam Yauch ("MCA") founded the then-punk-rock oriented Beastie Boys, later adding Adam Horovitz ("Ad-Rock") in 1983. During his career with the Beastie Boys, Mike D has acted as drummer, DJ, and vocalist for the group, and was founder of its production company in 1993.

During production of "Hell Is Other Robots", David X. Cohen and Ken Keeler traveled to New York to record the Beastie Boys for the episode but did not succeed. Mike D and Ad-Rock later recorded their parts separately after Cohen and Keeler had returned to Los Angeles.