Meghan Trainor Sings the Hits, Totally Loses It When Her Ultimate Hero Joins ‘Carpool Karaoke’ Ride: Watch
Meghan Trainor did all the things you expect a pop star to do when they hop into the car with James Corden for a "Carpool Karaoke" segment. The singer celebrated the release of her new album, Treat Myself, by busting…