Meghan Trainor exudes confidence when she takes to the stage, but the “All About That Bass”; singer admits things weren’t always that way.

In a new interview set to air on CBS Sunday Morning, she tells interviewer Tracy Smith that she grew up struggling with body image.

“I — every day — wore sweatshirts and sweatpants to cover up my body, ’cause I was so insecure,”; she says. “And it would be summer. And I would go on vacation and I’d be in Trinidad and Tobago, 90-degree weather, and I’d be wearing sweatshirts that said “Nantucket.'”;

Related: Meghan Trainor On Body Image In Hollywood: “No One Has Ever Told Me To Go On A Diet’

It was so bad, she says, even the pleas of her family to change into more weather-appropriate clothing couldn’t entice her to change.

“I didn’t want to show my arms,”; she says. “I didn’t want to show anything, and I was just so insecure and uncomfortable, and I thought, “All right, if I’m fully covered — I’m good.”;

Related: WATCH: Meghan Trainor Gives “Ellen’ First Interview Since Vocal Cord Surgery

It’s only now, she says, that she can look back and see how much this affected her life.

“And that’s not what I should have been feeling,”; she adds. “I see pictures of my face and I’m just — I’m like sad, and I’m in a sweatshirt and I’m in my room producing ’cause I just turned off the idea of, like, “You’ll be the face.'”;

You can catch the entire interview on CBS Sunday Morning which airs, as its title would suggest, Sunday morning on CBS.