Meghan Trainor's Weight-Loss Transformation — See Before and After Photos

In September 2014, Meghan Trainor attended the iHeart Radio Music Festival – Day 2 red carpet event in an all-black ensemble consisting of a cardigan with floral-patterned details, miniskirt, stockings, knee-high socks and heeled boots.

The "Made You Look" songstress made everyone look at her when she arrived at the 2014 American Music Awards in Los Angeles, Calif. For the event, she opted for a black long-sleeved dress with a lace pattern and complemented it with a pair of black pumps.

Trainor stepped out at the 2015 Billboard Music Awards in a full-length sequined gown with a thigh-high slit and a fitted bodice. She also wore strappy heels to complete her classy look.

In January 2016, the "Dear Future Husband" singer made a grand entrance at the People's Choice Awards in a dazzling wrap-style black dress with long sleeves and a plunging neckline. She paired it with a gold clutch and matching high heels.

Wearing a black long-sleeved top and a striped pencil skirt, Trainor stole the spotlight as she arrived at the 2016 Nickelodeon Kids' Choice Awards.

At the 102.7 KIIS FM's Jingle Ball 2016, the mom-of-two made waves in a stunning red dress that showcased her curves. The ensemble's white faux fur design splendidly matched her over-the-knee boots for additional glam.

Trainor showed up at the premiere of Smurfs: The Lost Village and served looks wearing a long-sleeved dress with a floral print.

Trainor joined The Four: Battle for Stardom finale's viewing party in a curve-hugging gown that highlighted her behind.

Trainor turned heads at the premiere of I Feel Pretty, wearing a white, off-the-shoulder crop top and high-waisted flared pants that accentuated her figure.

The "Like I'm Gonna Lose You" singer walked the Delta Air Lines 2019 Pre-Grammy's Party rocking a black pantsuit with a plunging neckline and black high heels.

During the premiere of The Hustle, Trainor walked the red carpet in a cleavage-baring, low-cut leather jumpsuit and heels.

Trainor set the press launch of The Voice 2020 UK Series on fire when she made an appearance in a long-sleeved, button-up shirt and matching wide-leg pants.

She rocked the 2020 Christian Cowan x Powerpuff Girls runway show in a light blue, body-hugging dress with large sleeves. She also styled her hair in pigtails, adding blue streaks to match her outfit.

On e year later, she gave birth to her and Daryl Sabara's first child, Riley.

Trainor lit up the 2022 American Music Awards by wearing a bright pink, two-piece outfit. The suit featured a plunging neckline and a belt buckle at the waist, while the matching pants featured bell-bottoms.

By that time, she had already begun her weight-loss journey through diet and exercise.

"I worked [out] every day and challenged myself. I was very dedicated and I started seeing the pounds come off one week at a time, one pound. I was like, 'I'm fighting,'" she told ET Canada. "I learned that I do like healthy food, and I learned what portions mean. My brain is so happy when I exercise."

A very pregnant Trainor was spotted out and about in New York City to promote her book Dear Future Mama: A TMI Guide to Pregnancy, Birth, and Motherhood from Your Bestie.

The "Don't I Make It Look Easy" songstress arrived in style at Intuit Dome opening night in Los Angeles, rocking her layered cropped blazer and matching miniskirt. She paired the two-piece outfit with black tights and loafers.

Trainor serenaded the attendees of iHeartRadio Q102's Jingle Ball 2024 amid her weight-loss journey.

The "Nice to Meet Ya" singer flaunted her slimmed-down figure at the Billboard Women in Music Awards in March 2025.

Following her appearance at the event, she shared an Instagram post to call out internet users who commented on her body instead of her music.

"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 revealed. "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."

She concluded, "Here's to celebrating talent, growth, and the power of putting yourself first. Let's keep shifting the convo to what REALLY matters. With love 💙."

"Booked so many shows this year... Can't wait ✨," Trainor hyped fans in an April post featuring snaps that showcased her slim physique. In the photos, she sported a black form-fitting outfit paired with thigh-high boots.

Trainor made everyone look when she entered her Barbie era at iHeartRadio's 102.7 KIIS FM Wango Tango in Huntington Beach, Calif. During the event, the "Lips Are Movin" singer wore a light pink bustier-style top and matching ruffled skirt.

She completed the look with a choker necklace and pointed-toe high heels.

While vacationing in Maui, Hawaii, Trainor put her dazzling physique on full display in a patterned Christian Dior two-piece bikini. She accessorized with sunglasses, a necklace and stacks of bracelets on both wrists.

She captioned the upload, "out of office 🌺🌴."

On July 2, Trainor displayed her b--- job in a lacy, cleavage-baring top with a deep neckline while cuddling her son Barry.

"our sweet Barry turned 2 yesterday😭 time is flying and I need it to slow down… AND we celebrated our anniversary of our first date haha 9 years since we went on our first date @darylsabara !!! Thank you for this beautiful life with these beautiful babies🥹💖," she wrote, celebrating her son's special day.

Trainor took all eyes on the red carpet at the premiere of The Paper in Hollywood, Calif., in August.

The "Me Too" songstress ditched her bra to fully expose her cleavage in a plunging black bodysuit, which she paired with a bow belt and white shorts.