Meghan Trainor: I wrote ‘Peanuts Movie’ song on a ukulele on my tour bus

She’s had five hits on the Billboard Hot 100 charts this year, and now “All About That Bass” singer Meghan Trainor is all about “The Peanuts Movie” with her new single from its soundtrack, “Better When I’m Dancin.’” “I wrote it in a short amount of time on my ukulele on the tour bus,” she explains, before taking TODAY behind the scenes of the animated film’s production. She also greets her dad, who’s on set in a hat with a Charlie Brown stripe, and reveals the next stage in her career: She plans to take acting lessons.Nov. 5, 2015