In a nod to the backside-busting dance move previously performed by Miley Cyrus in a unicorn onesie, the 19-year-old One Directioner stepped out of his seat to give hosts Darren Criss and Lucy Hale a taste.
Cue the Twitter meltdown.
The hashtag "#HarryDroppedThatThunThunThun" started trending as One Direction fans gleefully shared GIFs of his twerking.
I CANT STOP WATCHING HARRY TWERKING SOMEONE TAKE MY LAPTOP AWAY FROM ME OK— no. (@harrystagramxo) August 13, 2013
New to twerking? New York Magazine published a helpful guide for the uninitiated.
2014: The Year in Music [PHOTOS]