The two pop stars are both experiencing chart success with their respective singles `Blow` and `Till the World Ends` and Kesha is keen for them to celebrate in a unique way by going swimming without their clothes on, followed by a wild party.
She said: "We could go skinnydipping.
"We could have a party and it would be a dress-up-like-Kesha-or-Britney party. Either her place or my place, it doesn`t matter."
But it seems Kesha-s home would be the ideal place to have the party as she recently installed an underwater stereo at her Nashville pad.
She told People magazine: "I have a small, salt-water pool that has laser beams in it and a stereo so you can be under water listening to music. It`s really magical."
As well as wanting to strip off to go under water, Kesha recently revealed she uses her naked body to create art.
The `Tik Tok` singer has taken up painting in order to relax while on tour and she has now taken a new approach by using herself in her work.
The 24-year-old star said: "I have recently taken up painting as a way of killing time on tour.
"I got a big canvas, threw some paints down and then stripped off and rolled around on it.