Mariah Carey Casually Sings Along To Her Greatest Hits With James Corden

The best way to pass time in the car is obviously to belt Mariah Carey hits. New "Late Late Show" host James Corden understands this -- and invited the actual Mariah Carey to join him in the fun. In what is basically every commuter's dream come true, the singer accompanies Corden on his drive to work while the two sing along to some of her best songs on the radio. Get us into that backseat, please.