A wannabe singer transforming a beloved pop song into a moody, acoustic ballad? Been there, done that. What "Voice" season 4 auditioner Christian Porter does to LMFAO’s “Sexy and I Know It,” though, is something different altogether. The only thing this cover shares with the original is its lyrics; otherwise, Porter’s take on “Sexy” is a bluesy, falsetto-tinged jam that seems tailor made to go viral.

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