Battlekat is a band from Denmark, which appeared mysteriously on the Internet in 2011 as Just a number 05272011. Formed by Balder Brüsch, Jeppe Madsen, Johnny Odgaard and Matilde Katinka Böcher. They released their first EP, 05272011 - 10242011, at iTunes on October 24, 2011. They generated several speculations on blogs about who would be artists behind the videos, but it was revealed on May 27, 2011 that it was the band. They are performing a series of concerts in Europe since the date they were revealed.