VMAs 2014: Katy Perry and Riff Raff Pull a Britney Spears and Justin Timberlake

Britney Spears and Justin Timberlake a la the 2001 American Music Awards, anyone?

Katy channels Britney at MTV VMAs

Katy Perry Does Her Best Britney Spears Impression at MTV VMAs

Katy Perry & Riff Raff Channel Britney Spears & Justin Timberlake At 2014 VMAs!

Katy Perry's VMAs Outfit Was a Tribute to Britney Spears and Justin Ti

Here's What Celebrities' VMA Outfits Looked Like On Runway Models Before The Red Carpet

VMAs fashion: Katy Perry and Riff Raff pay tribute to Britney Spears and Justin Timberlake

Katy Perry Was Challenged by Britney Spears to Do an Impersonation

MTV VMAs 2014: Red carpet looks at this year's Video Music Awards accented stars' assets – New York Daily News

Katy Perry, Riff Raff rock all-denim à la Britney, Justin