last song in episode 8 season 3

lyrics are:

we could make it on our own, if we could just hang on

Who sings it!!

Thanks

Wedding Dreams | Video | The Hills: Surprise Engagement (Full Ep. 308) | MTV

I've watched the episode twice and the ending has a different song each time. The song I'm looking for is at the end of the episode from the link above. Please help.

thanks!