Meghan TrainorVALERIE MACON / AFP Tap Here To Add Us Weekly As A Trusted Source Add as a preferred source on Google Meghan Trainor's weight loss journey began with a health scare during pregnancy. "I'm getting a lot of hate online just posting who I am, and everyone's like, 'Why are you thin now? You were 'All About That Bass' girl,'" Trainor, 31, said during a recent appearance on iHeartRadio's KIISFM. "And I was, like, 19 when I came out with that, and I've been on a fitness journey since I got healthy - and it started when I was pregnant and I had gestational diabetes.