A short 70 second clip from the soundtrack of the movie Pitch Perfect stormed up the Billboard music charts - so quickly and unexpectedly  that the music industry decided to make a longer version suitable for radio airplay.

Here's the original version of Cups from the movie Pitch Perfect

The recorded version of Cups from the soundtrack

This is the version of Cups that's set to be released as a single, stretched out to just a hair over two minutes.

This is Anna Kendrick performing Cups on David Letterman: