Pentatonix have, objectively, been the best thing to happen to the fiercely competitive, unbelievably talent-filled world of a capella since the Pitch Perfect series. Seriously — they're aca-amazing!

Just ahead of their opening slot on Kelly Clarkson's Piece By Piece Tour this summer, the impressive quintet has rolled out a video that screams viral smash. In fact, it's racked up over a million views in counting in just one day's time!

Evolution of Michael Jackson is a pitch perfect (eh heh!) a capella medley tribute to the late King Of Pop (who tragically died six years ago on June 25), impressively spanning all the way back to the Jackson 5 era with 1969's "I Want You Back" and cycling through all the classics, including "Beat It," "Wanna Be Startin' Something" "Thriller" and "Bad" — all the way up to 1995's "You Are Not Alone." The sweet, sweet sound of pure vocal harmonies meeting some of the best melodies pop music has ever had the pleasure of hearing? Yeah — this one's an obvious win all around.

Check out Pentatonix utterly crushing their MJ tribute up top, and if you're really feeling their a capella mouth magic, make sure to check out new documentary, On My Way Home.

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