Meghan Trainor's Before And After Photos Highlight Incredible Weight Loss Transformation

Meghan Trainor has undergone a major lifestyle transformation, thanks to her trainer, Bella Maher.

Combining strength training, a high-protein diet, and a low dose of Mounjaro, the pop star says she feels stronger and healthier than ever.

Meghan Trainor has also been open about using Botox and getting a breast augmentation after weight loss, emphasizing confidence in her body.

Trainor is feeling stronger and more empowered than ever, thanks to a lifestyle overhaul guided by her trainer, Bella Maher, founder of Malibu Bodies.

After more than a year of working together, Maher recently celebrated Trainor's progress with a heartfelt Instagram post featuring side-by-side photos of the pop star from 2024 and 2025.

"Watching her transform from the inside out has been one of the most meaningful parts of my work," the trainer wrote in the caption.

Maher continued, "She did so much of this on her own before ever introducing a GLP-1, and even after starting it, the medication was simply a support, not the reason for her results. GLP-1s can be a powerful tool, but they're certainly not a transformation plan. SHE is the reason this worked."

Praising Meghan's commitment, Maher added, "She prioritized strength training, protein, intention, structure, and showing up even on the days she didn't feel like it. She built this. She earned this. And now she gets to live in a body that supports her for life. SO proud of you, my girl!"

In addition to using a low dose of Mounjaro, a GLP-1 medication, Trainor has been prioritizing strength training and upping her protein intake as part of her health journey.

Reflecting on her fitness transformation in a March interview with Entertainment Tonight, the singer admitted she'd spent years approaching exercise the wrong way.

"I learned a lot of tricks that I had no idea [about]," she said. "I was working out so incorrectly for so long. I was running and doing cardio, and my body was inflamed, always inflamed."

Trainor also shared that she's interested in longevity and slowing down the effects of aging.

"So anything that'll help me age backward, I'm into it," she laughed. "I just learned about the NADs. I was like, 'make me Hailey Bieber, I'll do it, I'll take it'… I'm trying all the things. I love a doctor explaining stuff to me."

The singer's motivation to be healthier seems to come from her family, especially after becoming a mother.

Meghan, who shares two sons, Riley and Barry, with her husband Daryl Sabara, told ParentsMagazine in 2022 that motherhood completely reshaped her perspective.

"I think when you have a kid, you just realize, 'Wow, life is beautiful and precious. I want to be the best for my kid," she said.

The singer added, "I've never been more motivated. I look at Riley and think, 'I'm going to do anything I can to live forever.'"

In August, Trainor surprised fans after posting a TikTok of herself attempting the viral "stiletto challenge," where participants balance on one leg atop an object while Nicki Minaj's "High School" plays in the background.

Viewers quickly filled the comments with shock over her transformed appearance, with one writing, "I did not recognize her at first. What happened?"

Just hours later, the Grammy winner confidently clapped back with confidence, uploading another TikTok of herself lip-syncing to Megan Thee Stallion's "Her" while flaunting her glam look.

"I don't care if these b-tches don't like me," she mouthed to the song. "'Cause, like, I'm pretty as f-ck. Just the other day, I heard a hoe say. Matter of fact, what could a hoe say with a face like this and a b-tch bad? Sh-t."

She captioned the video simply: "Glam team really did that."

In March, Trainor further reflected on her evolution, writing on Instagram, "I've been on a journey to be the healthiest, strongest version of myself for my kids and for me."

She 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 pop star has also been candid about cosmetic enhancements, revealing she's had Botox and a breast augmentation.

"I got my dream boobs and they are gorgeous," she told E! News. "I had two babies, I pumped everything out of me, and then I lost a bunch of weight, and my boobs were like 'we're not boobs,' you know," she continued. "I was like, 'I'm going to get some new ones,' and that was my dream."