Performing at the UK concert

Hip-hop's most unlikely patriarchs quickly moved from frat-boy favorites to innovators after the 1989 release of  "Paul's Boutique," which rewrote the whole book on sampling in rap music. Since then they've maintained a frontline presence in music by ruthlessly experimenting, even breaking the hip-hop code by playing their own instruments. The Beastie Boys' last release, 2004's "To the 5 Boroughs," was their  third straight number one album.

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