Katy Perry is currently one of the best singers in the world, for me there is no doubt. "Roar" and "Unconditionally" were two super songs, when I heard in "The Voice of Germany" "dark horse" for the first time, I was rather disappointed because I did not like the song. But when I heard it for the first time in the studio version, I was blown away! The song is no longer out catchy and there, you have to persuade them easily. Katy sings great and the beat is very first class! Also the chorus is really succeeded. Hopefully Katy makes a long so on!