This relationship looks brutal! 

In Justin Timberlake's new music video for "TKO" featuring Elvis Presley's granddaughter, model Riley Keough, the former *NSYNC star gets taken on one wild and painful ride. 

The video tells the story of what happens to Timberlake after things go awry between Justin and Riley -- and it's probably one of the most dysfunctional relationships we've ever seen.

The two also share some hot and heavy make out scenes together ... hope Justin's wife, Jessica Biel, doesn't mind!

We do love the "Mirrors" singer's mini-movie music videos -- what do you think of his "TKO"? Tell toofab in the comment section below!

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