original song written, composed, and performed by liv

original song co-written and performed by Carly Rae Jepsen

original song co-written and performed by Carly Rae Jepsen

song performed by Britney Spears

original song written and composed by The Clutch, Bloodshy & Avant, and Henrik Jonback; recorded by Britney Spears

original song written and composed by Bloodshy & Avant, Henrik Jonback, and Kasia Livingston; recorded by Britney Spears