The greatest cover song ever told

After much deliberation and some Diet Mountain Dew, I've selected the greatest cover song of all time. Here were my criteria:
-It fucking rules.
After much deliberation and some Diet Mountain Dew, I've selected the greatest cover song of all time. Here were my criteria:
-It fucking rules.
-It gets me happy.
-It's so, so insanely obscure that it makes our dear readers shit themselves out of fear of the unknown.
Read it and weep, wipe it and cry:
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Pop culture obsessives writing for the pop culture obsessed.