Meghan Trainor opens up on her weight-loss journey and using Mounjaro after 2nd pregnancy

Meghan Trainor credited the weight-loss drug Mounjaro for helping her get in shape after her second pregnancy in an Instagram post following her appearance at Billboard’s Women in Music event on March 29. The singer and her husband, Spy Kids alum Daryl Sabara, welcomed their second son, Barry Bruce, in July 2023. They have another son, Riley, who was born in February 2021.

For the uninitiated, Mounjaro is the trade name for tirzepatide, commonly prescribed to treat type 2 diabetes. In November 2023, the FDA approved the antidiabetic medication as a weight-loss drug.

On March 31, 2025, Meghan Trainor took to Instagram to share photos of her appearance at Billboard’s Women in Music event that weekend, where she was honored with the Hitmaker Award.

In the post's caption, Meghan Trainor noted that it was "disheartening" to see many people speculating about her body transformation instead of talking about her achievements in the music industry.

The All About That Bass singer told fans that she was on a journey to become "the healthiest, strongest version" of herself for her kids, crediting her lifestyle changes, exercising, and use of Mounjaro for helping her with her body transformation.

“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. 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,” Meghan Trainor wrote.

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Meghan Trainor opened up about trying to "biohack" her body to prevent aging

During her interview with Entertainment Weekly at Billboard’s Women in Music event, Meghan Trainor elaborated more about her fitness routine, adding that she was “trying all the things" to help her achieve her goal. She continued that she had been working out "incorrectly" for years, which caused her body to undergo inflammation.

Meghan Trainor also said she was trying to "biohack" her body to help her "age backwards," adding:

“So anything that'll help me age backward, I’m into it. I just learned about the NADs [food supplement capsules]. 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.”

Meghan Trainor recently embarked on "The Timeless Tour" between September and October 2024 to support her latest album, Timeless, released in June 2024.

During a March 2024 interview with People Magazine, the singer revealed that she prepared for the tour like she was training for the Olympics, adding that she wanted to "train and eat clean" to "feel good" on stage and not get winded while performing.

During a December 2024 interview with Today, the singer spoke more about her fitness regime, adding that she lifted weights three days a week. She also revealed that lifting weights "changed her life," adding:

“I try to go three times a week of lifting weights. I didn’t know lifting weights would change my life so much. I was, like, dying, trying to run on the treadmill, and it made me swollen. I just saw I can be stronger, you know?"

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In other news, Billboard’s Women in Music 2025 was held at the YouTube Theater at Hollywood Park in Inglewood, with Laverne Cox as the host.

Doechii, who recently won her first Grammy for her mixtape Alligator Bites Never Heal, was awarded the 2025 Woman of the Year Award, while K-pop girl group Aespa took home the Group of the Year Award.

Other winners include Gracie Abrams for Songwriter of the Year, Jennie for the Global Force Award, and Tyla for the Impact Award.