I just finished putting these together, listen to them all the time: http://blog.oztrampolines.com.au/workout-playlists-for-all-ages/Shia LaBeouf's motivational speech on repeat for the entire workout.
But seriously, I don't use my iPod during a workout, just listen to whatever the gym has playing. I got tired of taking headphones in and out whenever people asked for a spot or if I was using a piece of equipment.
Tell me you're piss taking ...vengaboys - boom boom boom boom
vengaboys - we like to party
cold chisel - khe sanh
savage garden - truly madly deeply
darude - sandstorm
missy higgins - scar
backstreet boys - backstreets back (alright)
psy - gangnam style