Following a day of playful teasing on social media, Justin Timberlake delivered on his promise of a new song to fans late Thursday with the release of "TKO." 

Weighing in at 7:06, the epic track is JT's latest collaboration with pal Timbaland, whose DNA (swinging groove, churning synths, layered vocals, etc) is evident. Timbaland even muscles his way in with some memorable lyrics, namely "She killed me with that coochie-coo!"

Vocally, Timberlake is in top form; lyrically, "TKO" leans heavy on boxing metaphors with lines like "I'm out for the count, yeah girl you knock me out."

"TKO" is the second track released off Timberlake's upcoming "The 20/20 Experience 2 of 2," due Sept. 27. It follows the release of "Take Back the Night" in July.

Questions? Comments? Let us know: @billboard

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