Weezer on Fallon

ICYMI: "I had to go and make a few mistakes to find out who I am," sings frontman Rivers Cuomo on Weezer's rockin' new single, "Back to the Shack" (Republic), which is currently slaying at Alternative radio; it'll move into the Top 10 next week. Mistakes and all, fans are clearly welcoming the band back to their collective bosom; here we see them bring the noise to The Tonight Show With Jimmy Fallon. Weezer's new album streets on 9/30. (7/29a)