I have about 6 playlists that are all SO different according to my mood. Right now, I've been listening to a lot of electro and dubstep. This is my favorite "pump up" song as of now: http://www.youtube.com/watch?v=-6I10SEJF6c
... I saw the DJ live a few weeks ago with Skrillex and I have sort of a mini crush on him
To be honest, a lot of times I work out to upbeat Disney songs
There's something that gets me pumped up when running to "I'll Make a Man Out Of You" (Mulan) and "Kiss the Girl" (Little Mermaid), etc ... I don't know anyone else who does this. My roommate thinks it's pretty strange.