The newly-single chart-topper is inviting fans to visit the official Grammy website and upload a video of themselves singing Perry's #1 hit "I Kissed A Girl."

The song itself, which spent a whopping seven weeks atop the Billboard Hot 100 last summer, is nominated for Best Female Pop Vocal Performance.

And, if the utter satisfaction of the whole world watching you bust a rhyme isn't enough gratification (all the amateur clips are playable on the awards site), one lucky singer will win $5,000 and a chance to appear onstage with 24-year-old Katy during the February 8 telecast of the 51st annual Grammy Awards. Wow!

Here's the nominee herself giving the details:

Of course, some amateurs have a better chance of winning than others.