At the 2014 MTV VMAs last night (Aug. 24), Katy Perry brought some major nostalgia with her red carpet dress! The singer and her date Riff Raff channeled Britney Spears and Justin Timberlake's iconic all-denim outfits from the 2001 American Music Awards.

Katy initially teased the look on Twitter, telling fans, "I must admit my outfit is a result of my love for nostalgia and my tumblr addiction #THISISHOWWEDOVMAS."

And in case anyone had any questions, the singer added, "WE'RE GOIN FOR DA BEST WORST DRESSED TODAY."

All eyes were on Katy as she arrived the at VMAs red carpet with Riff Raff, wearing a patchwork strapless denim dress that is unmistakably a nod to Brit's look for 13 years ago. As Twitter revealed, the reference was actually a result of a challenge Britney gave Katy:

While Katy's look wasn't our favorite fashion moment of the night (after all, Brit and JT are still panned for their original denim-on-denim outfits), we give the singer major points for having fun. She totally owned that dress!

And, speaking of all things Blue, Katy also achieved one of our life goals -- acknowledgement from Blue Ivy Carter:

See 2014 MTV VMAs Red Carpet + Show Photos!