Ferrari F1 drivers (Fernando Alonso and Felipe Massa) have been challenged by the 2011 Ducati MotoGP riders (Nicky Hayden, Valentino Rossi) for a cart and car competition on ice.   
Jules Bianchi and Giancarlo Fisichella are also spotted in this video, and it sure looks like these people know how to have fun when taking a brake from mainstream competitions.
Fernando Alonso managed to take the lead and win both kart and Fiat 500 stages. 
Watch the video with the Ducati Moto GP Riders vs Ferrari F1 drivers after the jump.

Video: Ducati Moto GP Riders vs Ferrari F1 drivers

Source: Ridelust