I have a few pandora stations I usually listen to when I lift.
One is a D-Block station. (Jadakiss, Styles P, Sheek Louch, etc)
the others are a varying degree of metal, ranging from hardcore (Between the Buried and Me) to more screamo-ish (Saosin), with a couple others in between. (Lamb of God, August Burns Red, etc)
I also have a Buju Banton station that I like to listen to sometimes as well.
Though, the last time I set a 1rm on deadlifts, I was listening to Joni Mitchell.