Musician enlists famous friends and unleashes generous spirit on new album
Essential listening: Fifteen rock and soul classics that set the stage for Adele
Band's 'Celebration Day' documentary is 'a testament to what we did in 2007'
"There's more dedication from the four of us than ever before"
"If we don't get along, everything else is irrelevant"
"I was ready to start working on a solo album"
"It's like you're caught inside a massive set of waves"