And by "Jam out" I mean you tap your foot, do some head-banging, lip-syncing, anything like that, to the song no matter where you are.
These would be two of mine right now.
Volbeat - Still Counting
http://www.youtube.com/watch?v=pV7aM32Jur8
Anyone else?
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Sabaton, Van Canto, 5FDP and more heavy metal.