EDIT: The poster who answered the question unfortunately got booted off the imdb. The trailer also got deleted from YouTube.
However, there's a soundtrack list available on the net, so here's the answer:
The catchy song that can be heard at the end of the long trailer for the movie, and also plays during the end credits in the movie, is:
"Something's Gotta Change" by Ruth Daniels
The song that can be heard at the end of the short trailer for the movie is:
"Lined up" by a band called Shriekback
Can't believe you actually found it... Great job! Thanks.
Music sounds like something Stewart Copeland would be proud of.