Justin Timberlake Brings Hot Barbershop-Quintet Action to ‘Fallon’ (Video)

Justin Timberlake tosses on the straw hat and bow tie to kick it really old-school on his hit "SexyBack"

Justin Timberlake is bringing barbershop back —  and thanks to Jimmy Fallon, we can watch how he attacks.

Timberlake — who's currently engaged in a week-long run on "Late Night With Jimmy Fallon" to promote his new album "The 20/20 Experience" — kicked it really old-school on Tuesday night's episode, performing a barbershop version of his 2006 smash "SexyBack" while wearing a brightly striped jacket and red bow tie. (Could this be the suit and tie he sings about in his recent single?)

Not content to give a spiffy retro-fit to his signature song, Timberlake went one step further to deliver a barbershop-quintet rendition of the tune.

Watch the old-timey magic unfold in the video.