I can only agree with the fully. Have seen the song yesterday by chance at MTV and heard and was totally surprised and overwhelmed by the perfect voice acting so strong and clear, never intently from the first bar. Katy the song out so skin that one simply knocks. Along with the perfectly blended instruments enteht a firework! At the end it pops then another right! More please. I'm looking forward to the upcoming album! Thank you Kathleen Brien!