Apple has announced that fan favorites including Justin Timberlake, Thirty Seconds to Mars, Jack Johnson and Jessie J are among the headliners at this year’s iTunes Festival in London. Running every night in September at the Roundhouse, the iTunes Festival features over 60 acts performing at the legendary venue.

Performances can be watched live or on-demand by millions of iOS users around the world on their iPhone, iPad or iPod touch, as well as by music fans with iTunes on their Mac or Windows PC or in HD with Apple TV. Tickets are free for competition winners only.

“This year’s iTunes Festival is the best ever with an incredible lineup of global superstars and stellar emerging artists,” says Eddy Cue, Apple’s senior vice president of Internet Software and Services. “Music fans around the world are going to love watching this incredible month of music, whether in London at the Roundhouse or on their iOS device. We’re honored so many renowned artists are part of this year’s lineup.”

Music fans from across the world, including the US, Australia, Brazil, Canada, Europe, Japan and Mexico can win tickets to the iTunes Festival through competitions run by local media partners. In the UK, fans can win tickets using the iTunes Festival app and the iTunes Store as well as select media partners including Channel 4, Global Radio and Metro.

Sir Paul McCartney, Amy Winehouse and Crowded House played the first iTunes Festival at London’s Institute of Contemporary Arts in 2007. Since then over 370 artists have performed in front of more than 370,000 fans and tens of millions more online and on television. Other performers have included Adele, Coldplay, Foo Fighters, Alicia Keys, Paul Simon, Jack White and Oasis. Performances are available for purchase and download on the iTunes Store.