what's your theme song?

i was reading an article recently where the author talked about having a "theme song"... either one that really accurately defines your life, or calms you down when you're stressed, or alters your mood in some other way. think "ally mcbeal", when one of them would need to feel pumped up about something and barry white music would start playing in their head.

mine would have to be "september" by earth, wind & fire. every time i hear that song, i stop in my tracks and start bouncing around and singing. just the other night when i was out to dinner with a girlfriend, i was sitting there full and exhausted at the end of a long day... and "september" came on, and i completely perked up again and boogied in my seat like an idiot. so... yeah. september. it makes me so insanely happy.

so... what's your theme song?