Katy Perry  made quite the entrance at the 2014 MTV VMAs on Sunday night when she was joined by Riff Raff while wearing Britney Spears  and Justin Timberlake 's infamous matching denim outfits from the 2001 American Music Awards. (Don't pretend like you don't remember!) Aside from her cheeky homage to Brit and JT, Katy had a big night ahead of her as she was up for several awards, including winning the award for best collaboration with Juicy J for "Dark Horse." But the highlight of her night might have been the seal of approval she got from Britney, who shared her joy at seeing the denim dress on Twitter:
.@katyperry  Just when I thought the denim dress had retired....you bring it back! You looked amazing tonight bb ;)
— Britney Spears (@britneyspears) August 25, 2014 
Be sure to check out all the red carpet arrivals from the MTV VMAs , and don't forget to tune into our live viewing party !
Britney and Justin at the 2001 American Music Awards.