The singer told The Late Late Show host that she's starstruck by Dr. Phil. "I went to a show the other day and I couldn't stop crying," she said. "For my birthday, my brother got me tickets to see Dr. Phil live and I went there and it was the greatest day of my life. Everything he says is absolutely spot on," she said. Then Dr. Phil went in the car and joined them in singing "All About the Bass."
TOPICS: Dr. Phil, CBS, The Late Late Show with James Corden, James Corden, Meghan Trainor, Phil McGraw, Carpool Karaoke, Late Night