The iTunes festival 2011 in London is coming up, when the online world collides with the real one for a set of exclusive gigs in the capital. Of course, there's an app for that. In fact, there's an app for both the iPhone and iPad.The iTunes Festival 2011 gives you the lowdown on the whole event, with 62 bands playing over 31 nights at the one venue, that being the Roundhouse in London. Tickets are free, but, here's the clever bit, you have to get the app and enter the draw to win them via that app. Reason enough to download it as a music lover, especially with the app being free. They'll even deliver the tickets straight to your handset, saving the worry of losing/forgetting them. Just remember to take your phone.You'll also be able to find out who is on for each day, be in with a chance to win a 'festival pass' to get in on all of the gigs with a friend, get the latest news, browse photos for each night just hours after that gig has finished and if you don't happen to live within commuter-distance of the gig, you can access streams of selected performances live.Obviously Adele is on, as you can see from the image, but to see the other 61 acts, you'll need to spend a few seconds grabbing this.