Apple has just announced that global superstars 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 on the iPhone, iPad or iPod touch, or by music fans with iTunes on their computer or in HD with Apple TV. Tickets are free for competition winners only.

For more information about the 30 nights of concerts read the full press release here.