Justin Timberlake, Jessie J and Queens of the Stone Age are among the headline acts for this year's iTunes Festival.
More than 60 acts will be performing throughout September at London's Roundhouse for the free series of events
Also on the bill are Primal Scream, Thirty Seconds To Mars and Jake Bugg.
Jessie J - who is also a coach on BBC One's The Voice - axed a tour earlier this year because she did not want to play the sell-out shows before the release of her album, which had been delayed.
She said: "I'll be back with new music, a new look and a party you're all invited to."
Also on the bill are Phoenix and Jack Johnson, with others to be announced over the coming weeks.
Apple executive Eddy Cue said: "This year's iTunes Festival is the best ever with an incredible lineup of global superstars and stellar emerging artists. We're honoured so many renowned artists are part of this year's lineup."
Fans can apply for tickets at itunes.com/festival and the performances are also being streamed online.