Katy Perry Accepts Britney Spears Impression Challenge

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It all started when Britney Spears did a spot-on Woody Woodpecker impression on Instagram. Now, she's throwing down the gauntlet to fellow songstress Katy Perry.
After Katy complimented Britney's video, Britney challenged Katy on Twitter, writing,
To this, Katy responded that she is accepting the challenge, upping the ante by promising to reveal her best impression on the MTV VMAs red carpet.
It's anyone's guess who Katy will mimic -- maybe Britney herself? And one has to wonder -- will this become the next Ice Bucket Challenge?
The MTV VMAs red carpet starts at 7 p.m. ET/PT.
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