T in the Park celebrates its 20th year in 2013, with 85,000 music fans per day set to descend on Kinross over 12th - 14th July to enjoy performances from over 200 artists, including headliners Mumford and Sons, Rihanna and The Killers, plus Calvin Harris, Kraftwerk, Frank Ocean, Snoop Dogg, Yeah Yeah Yeahs and many more.