The Subways

So yes, they were on the O.C. a number of years ago, and yes they are at least somewhat mainstream, but I don't regard the second tag as necessarily bad and the band is good enough that I can avoid the first one. Plus, they have a new album hitting shelves in June, and I thought I'd get people excited for it.
The Subways originate from England, near London, and sound much like the Fratellis, not because both bands have lead singers with UK accents, but because both are loud, fast, fun, and easily danceable. If you like anything resembling Punk, Grunge, or Garage bands, then this music is for you. The difference between this band and other post-punk/grunge bands is, they actually have musical talent. The singer is fantastic, the guitarist uses more than his bottom two strings, and the bassist plays more than one instrument (I like that, you may not care so much). Songs like "She Sun" and "Somewhere," although not released as singles and not as popular as the others, prove how much depth this band has. In the end, though, this band still comes down to power chords and fast drumbeats. Simple recommendation: If you liked the Fratellis, even a little, buy a CD; if you didn't, don't. Its really that simple.