"I feel like everything has changed since we came in here. Everything," Zac Brown said. The one-minute clip shows studio footage of the band rehearsing the first single off the album, "All Alright" and Brown asserting that he's still fighting for "the song."

"To me, my favorite way of recording with a band is to start in the beginning of the day with a song that's kind of written and then you figure it out like a Rubik's Cube," Dave Grohl said.