Girls - Season 2, Episode 9: Soundtracks

Playing in background @MAU party after Marnie's song (originally from the Vengaboys)

Playing in background when Adam and Natalia enter engagement party.

Playing in background @ Charlie's MAU party

Adam dancing at party

Last scene/Ending Credits 

DJ is playing this before Marnie interrupts...

Hanna & Adam talk outside

Music playing at Charlie's party while Marnie is asking Ray how good her voice is.

Version performed by Marnie at the party.

Marnie's song @ Charlie's MAU party