From Wikipedia, the free encyclopedia. Rahzel Manely Brown (born October 6, 1964), is an American beatboxer and rapper, formerly a member of The Roots.[1] Rahzel is known for an ability to sing or rap while simultaneously beatboxing, as evidenced in his performances of "Iron Man" and his signature song "If Your Mother Only Knew", a hidden track on Make the Music 2000. His talents are showcased in various solo projects as well as on Ben Harper's 2000 single "Steal My Kisses." He also provided his own voice on vide