You can win two tickets to join Linkin Park at an exclusive screening of Tranformers: Dark of the Moon in Berlin. All you have to do is Shazam "Iridescent" with your smart phone and sign up. If you don’t have Shazam, find out more about the mobile application here: http://www.shazam.com/ How to enter: 1) The promotion is only open to UK users. 2) To take part, simply download the free Shazam app…