Katy Perry and Riff Raff totally channeled Britney Spears and Justin Timberlake circa 2001 at the 2014 MTV VMAs red carpet.

The 'This Is How We Do' singer showed that rocking a strapless patchwork denim gown is exactly how she does! Riff Raff, for his part, rocked a Canadian tuxedo in an homage to JT's matching outfit.

As eclectic as KP's red carpet outfits are, we never saw this one coming. However, leave it to Katy to take an iconic look at raise it to the next level. In that regard, we love it. However, the head-to-toe denim look is a lot to digest ... and not our favorite style moment of the night.

See Katy and Riff-Raff in the photos below!

So. Much. Denim.

Jason Merritt, Getty Images

Katy's hair looks lovely, and we are totally digging her red lip. Never a boring fashion moment with this one!

Jason Merritt, Getty Images

  See More 2014 MTV VMAs Red Carpet + Show Photos!