Michael Diamond (aka Mike D) is the lead for the Beastie Boys. His partners-in-crime are Adam Yauch (aka MCA) and Adam Horovitz (aka Ad-Rock). Currently with the BBoys is Mike Schwartz (aka Mixmaster Mike) doing... mixing. Duh. He's a scratch DJ. &Ricky Powell hangs out with the boys taking photos and causing trouble. Mario Caldato, Jr., helps to produce albums and does admin/paper work (I think).