Michael Buble had some fun with the audience at his iHeartRadio Live concert in Tribeca ... at Kim Kardashian's expense.

While performing at the P.C. Richard & Son Theater, Buble told the crowd:

    “Ladies and gentleman, I have a very special guest. Please welcome Kim Kardashian [to the stage]. Nah, just [bleeping] with you! That b**ch isn’t coming on my stage.”

Ouch! And Buble didn't stop there. The crooner then dedicated his song Feeling Good to Kim's estranged hubby Kris Humphries.

Gotta love Buble's sense of humor!