Just so the pipes don't freeze.

Nominations for "the greatest pop/rock song ever" please. Main criterion is that it must have received significant commercial air time, but that when it comes up on your iPod your reaction isn't "I never want to hear that again sober" (e.g. Hotel California), but rather "maybe I'll hit skip/back when it's finished so that I can hear it again".

For me, there can't be any doubt, it's Sultans of Swing by Dire Straits. Various songs by Elvis Costello (Radio Radio and Chelsea to name two), and Talking Heads (Psycho Killer, Once in a Lifetime, Life During Wartime) come close; but there's just something about that upbeat drum/guitar intro that hooks me every time.

So, what say you?