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KATY PERRY wants YOU to go vote on TUESDAY!

And, if you do, she'll make you famous on Twitter... especially if your outfit is super cute!

The pop superstar - who has become the pop-star-in-chief as of late - encouraged people over the age of 18 to go vote Tuesday in the Presidential election, even promising to retweet people who do so if they send her a photo!

"If you're over 18, and you have a real cool outfit and you wear it on Tuesday, you tweet me and I'll retweet it," she told a crowd in Wisconsin where she was at a campaign event for one of the Presidential candidates.

She's @katyperry on Twitter, btw.

A recent poll showed that KATY PERRY is a massive influence on voters under the age of 35, and as such, Perry has been using her influence to encourage young people to vote -- and at the same time -- to help the Red Cross relief efforts as people on the East Coast recover from the recent hurricane.

For more, click here.