Kid Rock Performs At Dustin Johnson And Paulina Gretzky's Wedding

Dustin Johnson and Paulina Gretzky had a self-proclaimed "American Bad Ass" at their wedding this weekend ... with none other than Kid Rock taking the stage to perform for the newlyweds.

DJ and the hockey legend's daughter tied the knot at a lavish event at Blackberry Farm resort in Tennessee on Saturday ... and Paulina shared a short video of the reception, which featured the controversial singer.

"You are the joy of my life @djohnsonpga," Gretzky said on Instagram. "Thank you @kidrock."

Now, KR has a history of being unapologetically himself on the mic -- dropping homophobic slurs and going after Oprah Winfrey in the past.

His performance over the weekend seemed to be free of controversy ... as Rock sang a cover of Chris Stapleton's "Joy of My Life."

The musical act might not be as random as you think -- Rock is tight with DJ and Wayne ... and they've hit the links together over the years.