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Ke$ha has a unique idea on how to celebrate her and Britney's chart-topping singles "Blow" and "Till the World Ends" -- by "skinny dipping" together!

Ke$ha says the naked swimming would ideally take place at a big bash they'd throw together. "It would be a dress-up-like-Ke$ha-or-Britney party," the singer said. "Either her place or my place, it doesn't matter."

The LA native, who recently moved into a tricked-out crib in Nashville, suggests her new pad would be the perfect place for a little nude swimming party. "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."

Although Ke$ha and Britney may not know each other personally, they do have a pretty interesting connection -- see what it is ... after the jump!