Watch Green Day Debut New Song “Look Ma, No Brains!” At When We Were Young

This past weekend, the emo and pop-punk nostalgia-fest When We Were Young went down in Las Vegas. Once again, the show brought the same ridiculously loaded lineup to the same venue for two days in a row. The two headliners were Blink-182, who just released their classic-lineup reunion album One More Time…, and Green Day, who have a new album of their own on the way.