One Direction kicked it a little old school at their show in St. Louis last night, covering Hanson's 1997 smash hit 'MMMBop.'

Just the insanely catchy chorus was enough send fans into a frenzy, because as every dual One Direction-Hanson fan knows, the only thing better than the two bands existing separately is somehow fusing them together. And since it's pretty unlikely that Hanson will cover 1D any time soon, this is the closest we're gonna get.

While the guys kind of butchered the lyrics on the chorus, their falsetto vocals and sweet dance moves were more than enough to make up for it. Seriously, just check out the Instagram vid above.

This isn't the first time that the boy band showed off their love for the 'Get the Girl Back' rockers -- last year, Harry Styles and his pal Nick Grimshaw donned blonde wigs and imitated the band circa '97, tweeting:

And it seems like he still thinks that he is.

Watch One Direction cover 'MMMBop' in the video above!

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