I personally don't care for the Use Somebody song, there are far better songs on the Only By The Night album. Crawl, Closer and Revelry are a few of my favorites.
I read somewhere that they were asked to make an appearance on Glee and turned it down. I actually like Glee, but good for them for not "selling out". I believe 3 of the 4 out of the band are actually brothers too.