I never get tired of singing Tom Petty songs

One of my favorite things about driving is having a good set of mix cds to listen to on the way. The only place I really sing is in the car. (Sorry fellow passengers, now and forever.) Next week we're driving to Dragon*con, so I need to get cracking on some music.

Please suggest your favorite driving songs. If you don't drive, please suggest your favorite riding on public transit/plane/long trip music.