High energy dance music recommendations?

Does anyone have any recommendations for some high energy dance-type music on cd? You know, the type of thing that makes you want to get up and dance around the room, do some aerobic exercises, that sort of thing.
(I have lost 50 lbs recently. Prior to that, I didn't have the energy or inclination to do this, so I am not familiar with the possibilities. But I have more lbs. to lose, and I think it's a great way to get exercise...
Please ignore the stupid member name!)

Thanks
-Steve