VIDEO : James Corden and Demi Lovato Perform Singing Telegrams

James Corden continued to show off his singing ability on Tuesday's Late Late Show. But instead of taking guest Demi Lovato on another "carpool karaoke" outing, the host and Lovato took their singing door to door. Corden said as they hit the road, "I really want to get into this singing telegram business." They start off by surprising Dry Bar employee Sarah at work. She's just earned a promotion, and what better way to celebrate than with a twangy singing telegram duet. Next up is a birthday telegram in the tune of "Banana Boat Song (Day O)" ? which wears the duo out, so they take a bubble tea break.