What's on your playlist?

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I'm looking to expand my workout playlist. I have everything from Mystikal to Paul Simon. Tool to Bitney. Brooks and Dunn to Def Leopard. Lesser knowns like Vast and Jem. I have songs for all kinds moods...and nothing is off the table. What are some songs or artists that get you motivated while working out, whether cardio, weights or yoga/stretching?