Katheryn Elizabeth "Katy" Hudson, better known by her stage name Katy Perry, is an American singer, songwriter, and actress. During the early stages of her career, Perry's musical style gravitated towards gospel and she aspired to be as successful as Amy Grant. At the age of 15, she heard Queen's "Killer Queen" and has described it as being the song that inspired her to pursue a career in music. Perry stated she sees "everything through a spiritual lens". Although, she might not be a gospel singer now, it doesn't stop her fans from shouting "hallelujah" for Perry anyway. Perry has been known for her concert performances which feature elaborate stagings and costumes, along with her playing piano and guitar.