This 8½x11 inch sheet music for Intergalactic has been personally signed in-person by Ad-Rock (Adam Keefe Horovitz) of the legendary hip-hop group Beastie Boys. The autograph is bold and clear, making it a must-have collectible for fans of hip-hop memorabilia and music history. Signed in person by Ad-Rock and certified authentic by JSA. Item Type: Sheet Music Autograph: In-person Authentication: JSA [James Spence Authentication] Certification Number: AP57661 Collector Notes: A rare collectible for music and Beastie Boys enthusiasts, this signed sheet music combines iconic hip-hop history with verified authenticity. The JSA [James Spence Authentication] COA ensures collectors can trust the signature, making it a valuable and display-ready piece.