COSTNER & MADONNA IN ODD FLIRT FEST!

Superstars tight after rocky start

- 

SULTRY singer Madonna is flirting up a storm with Yellowstone Kevin Costner cowboy more than 33 years after mocking the Hollywood hunk in her Truth or Dare documentary, tipsters tattle.

"They don't broadcast it, but Madonna and Kevin have become really tight. They have a lot of admiration for each other these days," an insider shares.