Adam Horovits, better known as Ad-rock, is a rapper, producer, and actor. He is best known for being apart of the famous hip-hop group Beastie Boys. He will make his first public appearance since MCA’s death at a benefit concert in Brooklyn. Ad-rock came up with the idea to dress as undercover cops in the music video “Sabotage.” He didn’t believe in taking ownership of a song; if it was a song then it was all of theirs.