Call the conductor, there’s a fire on board!

During the live Ustream recording sessions for the Diddy-Dirty Money Last Train to Paris album release party Tuesday night (Dec. 14)……things got a little too heated up.

Somehow a naked model’s hair caught on fire while she was sitting in a bath tub full of bubbles…and once everyone noticed, they all ran to take cover. (LOL)  Comedian Kevin Hart‘s reaction was priceless! Peep the hilarious footage below….

Thank goodness she was in water….