Which song played in the end of the episode of season 2 when Felix gave different tasks to guys?

If you mean episode five in season two, where Felix organized "dare night" it may be the song "Collide" by Howie Day. If it's not the song you were looking for, you can check out this site, link , where there's a tracklisting for that particular episode, there's also tracklistings for every other episode in every season :)