Keith Urban isn't fazed by the in-fighting between his fellow American Idol judges Mariah Carey and Nicki Minaj, calling the panel a "very alive and very invigorating" place to work.

The country singer was caught between the two divas after they became embroiled in a shouting match during try-outs in Charlotte, North Carolina on Tuesday.

In video footage of the incident, Minaj can be heard yelling and swearing at the Hero hit-maker, ranting, "I'm not f**kin' putting up with her f**kin' highness over there," while Carey retorts, "Oh why, why do I have a three year old sitting around me?"

Producers decided to cut the tension by calling off the auditions for the day, but Urban insists he enjoyed the pair's heated exchange as it shows just how "passionate" the two stars are about their jobs.

He tells entertainment show Extra, "I was the U.N. (United Nations). I love it, I gotta say. I love working with passionate people. I love artists. Everyone just sort of expressing themselves. It's a very alive and very invigorating work environment."

"A lot of passion."