Meghan Trainor’s path to weight loss was sparked by a health concern she faced during pregnancy.

“I’m receiving a lot of backlash online for just being myself, with people asking, ‘Why are you thin now? Weren’t you the ‘All About That Bass’ girl?'” Trainor, now 31, shared during a recent interview on iHeartRadio’s KIISFM. “I released that song when I was 19, and I’ve been on a fitness journey ever since I prioritized my health. It all began when I was pregnant and diagnosed with gestational diabetes.”

The Mayo Clinic explains that gestational diabetes is a condition identified during pregnancy that impacts how the body’s cells process glucose, or sugar. This can lead to elevated blood sugar levels, posing risks to both the mother and baby. Managing this condition often involves changes in diet, exercise, and lifestyle.

Trainor emphasized her commitment to maintaining her health after giving birth, aiming to be strong enough for her tour and capable of lifting her two young sons, Riley, 4, and Barry, 2, “out of their cribs without straining [my] back.”

Meghan Trainor’s transformation drew attention again following her appearance on the red carpet at Peacock’s The Paper premiere in August 2025, sparking conversations among fans. For the Grammy-winning artist, this journey has been about more than just physical changes; it’s about embracing a new phase of life and feeling her best.

“Now I’m strength training three times a week in the gym, and I am so focused on health, and now I’m obsessed with my hormones, my gut,” the pop star continued. “I just want to feel good because this job is hard if you don’t feel good. But I got a lot of hate for being thin, so it confused me and rattled me.”

Following Barry’s birth in July 2023, Trainor — who rose to fame with her body positivity-centric single “All About That Bass” in 2014 — began to slim down considerably, sparking many conversations online about her weight. Many people accused her of using a GLP-1 injection like Mounjaro, Ozempic or Wegovy to shed pounds.

While Trainor has admitted to using Mounjaro in her weight loss journey, she explained in a March Instagram post that she used the drug as a supplement to her diet and exercise plan.

“Feeling so honored to be recognized by @billboard Women in Music as a Hitmaker — what a dream! But it’s a little disheartening that so many of the questions (and comments) were focused on my body instead of my music, my passion, or the decade of hard work that got me here. This is what it’s like to be a woman in the music industry,” she wrote. “No, I don’t look like I did 10 years ago. I’ve been on a journey to be the healthiest, strongest version of myself for my kids and for me.”

Trainor continued, “I’ve worked with a dietician, made huge lifestyle changes, started exercising with a trainer, and yes, I used science and support (shoutout to Mounjaro!) to help me after my 2nd pregnancy. And I’m so glad I did because I feel great.”

The “Still Don’t Care” singer later revealed that she and husband Daryl Sabara tried Mounjaro together.

“We were like, ‘We have to make sure we don’t lose muscle that we worked so hard gaining all those years,’” she said of their experience taking the medication. “We stay in the gym, we work out, we eat right, and we just noticed that we were less hungry.”

Meghan Trainor’s latest mirror selfie made Us look. Trainor, 31, took to her Instagram Story on Wednesday, October 29, to repost a photo taken by her coach, Bella Maher, and shared on Maher’s personal training page, Malibu Bodies. In the snap, the women coordinated in all-black workout ensembles with white socks and sneakers as Trainor […]

During an interview with Extra published on Tuesday, November 18, Trainor opened up about the negative comments she received after she lost 60 pounds and how the criticism affected her.

“I started posting pictures of myself recently, just like I always did, but for some reason, a flame went off and everyone got mad,” she explained. “Just like, ‘Ew, don’t recognize you. You’re just a walking nose.’ Crazy stuff. Like, mean.”

Trainor added, “I was like, ‘This doesn’t affect me.’ Yes, it did. I cried so much. They got to me. And my therapist was like, ‘You give them a lot of power,’ and I was like, ‘Yeah, I wish I didn’t.’ So I’m trying to learn at 31 how to not give strangers power.”