Two words: Girl Talk!
It gets me so pumped up, so much fun to listen to.
If you haven't heard of him before (he's a DJ), he mixes little bits of realllly different songs and genres together, makes it sound great, and often times better than the original songs. Here's a good one... http://www.youtube.com/watch?v=6JBAxkZun3s
it starts off a little vulgar but I just love the beat, haha.