What is the song playing in 'Skins' series 3, episode 4...?

What is the song playing in 'Skins' series 3, episode 4 (most recent episode) when Freddie and Effy are talking outside Pandora's party and Freddie says that he needs to take Jay Jay home? It's playing in the background, presumably at the party. Note that it is not the song playing when Freddie pulls Jay Jay from the party - it changes as Effy get outside. It's about 37 minutes in.