Bruno Mars is James Corden's latest guest on Carpool Karaoke. Following Madonna's memorable visit the "Versace on the Floor" has become the latest star to step into the car with James. He shared a selfie of him and the late-night host on Instagram, writing, "When an unstoppable force meets an immovable object @j_corden Thanks for the lift." And now we have the full segment to enjoy. Prepare yourselves!