Aerobic Music!
If you enjoy aerobics and want to do it on your own, or even teach your own class then you should check out www.workoutmusicvideo.com. I came across this site today and it has a huge selection of CDs you can purchase from a variety of different workout types including: aerobic, spinning, yoga, and many more. When you select a CD it even provides you with the BPM of each song...very helpful!