Arcade Fire's Win Butler makes Kanye West and Beck mash-up - listen here

Ever wonder what rock stars do in their spare time?

Well, when Arcade Fire aren't recording albums or touring, apparently they make mash-ups of songs by other artists.

To his credit, the Canadian band's frontman Win Butler has done a really great job of splicing Kanye West's 'Jesus Walks' with Beck's 'Loser' after the recent West-incited Grammy debacle.