. . "Written in a disco-rock style which runs over the backing track, consisting of a mix of violins and house music.[22][40][41] The song has generated comparisons to artists such as Coldplay and Leona Lewis.[39][42] According to Perry, the song was inspired by Jack Kerouac's novel On the Road, and she has said on many occasions that it is her favorite song from the album.[43][44]" . . .