The 5 Secrets Behind Skinny Meghan Trainor's 60-Pound Transformation: Diet, Mounjaro, And Strength Training

The dramatic body transformation of Meghan Trainor has dominated headlines throughout 2024 and 2025, sparking both admiration and intense public scrutiny. As of today, December 12, 2025, the Grammy-winning singer has openly discussed her journey, revealing she lost approximately 60 pounds in a concerted effort to prioritize her health after a significant medical diagnosis. This new, "skinny Meghan Trainor" look represents a profound shift from the body-positive anthem star who first gained fame with "All About That Bass."

The conversation around her slimmer physique has been complex, involving rumors, criticisms that she's now "too thin," and her candid confessions about the strict diet, rigorous strength training, and prescription medication she used to achieve her goals. This is the complete, up-to-date look at the secrets behind her incredible health and fitness journey.

Meghan Trainor: A Quick Biography and Profile

Meghan Elizabeth Trainor is an American singer-songwriter and television personality known for her blend of pop, doo-wop, and R&B. She first rose to international prominence in 2014.

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• Full Name: Meghan Elizabeth Trainor
• Born: December 22, 1993
• Birth Place: Nantucket, Massachusetts, United States
• Age: 31 (as of December 2025)
• Spouse: Daryl Sabara (m. 2018)
• Children: Two sons, including Riley (born 2021) and a second son (born 2023)
• Career Highlights: Grammy Award for Best New Artist (2016), multiple platinum-selling singles including "All About That Bass," "Lips Are Movin," and "Made You Look."
• Public Persona: Initially celebrated as a champion of body positivity and embracing curves.

The Catalyst: Gestational Diabetes and the 60-Pound Goal

Contrary to the narrative that her transformation was purely aesthetic, Trainor has repeatedly stated that her weight loss journey was fundamentally driven by a health crisis.

The turning point came during her first pregnancy when she was diagnosed with gestational diabetes. This diagnosis served as a wake-up call, forcing her to re-evaluate her relationship with food and exercise. After giving birth to her second son, she committed to a full lifestyle overhaul to ensure she could be a healthy, energetic mother for her children.

The results, documented by her fitness trainer on the Malibu Bodies Instagram page, showed a dramatic body transformation between January 2024 and October 2025, with the singer dropping an impressive 60 pounds.

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The 5 Pillars of Meghan Trainor's Transformation

Meghan Trainor's new physique is the result of a multi-faceted approach, combining medical intervention, a rigorous fitness regimen, and a complete dietary shift. The five key components are:

1. The Role of Mounjaro and Weight-Loss Medication

In a candid revelation in April 2025, Trainor and her husband, Daryl Sabara, confirmed they were using Mounjaro as part of their weight loss strategy. Mounjaro (tirzepatide) is a medication approved for managing blood sugar in adults with type 2 diabetes, but it is also used off-label for chronic weight management, similar to Ozempic. This confession came after months of speculation and "Ozempic rumors" following her debut of a noticeably slimmer physique in late 2024.

2. Strength Training and Lifting Weights

The singer credits strength training as the key to not just weight loss, but improved energy and overall strength. Her workout routine involves lifting weights three times a week, often alongside her husband, Daryl Sabara, who has also undergone his own fitness journey.

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This focus on muscle building helped boost her metabolism and achieve a toned look, a significant change from her past routines.

3. A Strict, Protein-Focused Diet

Trainor's diet was completely overhauled to support her fitness goals and manage her health conditions. She shifted to a strict diet, emphasizing high protein intake. This focus on protein is crucial for muscle repair and satiety, especially when engaging in intense strength training.

4. Rewiring Her Mindset and Body Image

The psychological aspect of the transformation was as important as the physical. Trainor had to "rewire her mindset" to foster a positive body image, even as her body changed dramatically. She has been open about the challenge of balancing her past identity as a body-positivity advocate with her new, smaller frame. She even joked about "trying to grow my butt back" after the weight loss changed her shape.

5. Hitting Back at the 'Too Thin' Critics

The most recent challenge for the singer has been the public backlash. After losing 60 pounds, she faced a new wave of criticism, with people commenting that she was "too thin" and that they "don't recognize her anymore." Trainor powerfully addressed these critics, stating that she is "literally for the first time ever, after having babies, taking care of my health to the max." She emphasized that the world is "crazier and meaner" but she is focused on her health, not external validation.

The New Era of Meghan Trainor: Health Over Hype

Meghan Trainor’s journey from the "All About That Bass" star to the current, slimmer physique is a powerful narrative about personal health priorities. Her transformation, which involved the use of Mounjaro, intense strength training, and a strict diet, underscores a commitment to her long-term well-being following her gestational diabetes diagnosis.

The "skinny Meghan Trainor" is not just a visual change; it represents a hard-won victory in a personal health battle. By being transparent about the methods—including prescription medication and a complete lifestyle change—she offers a realistic, albeit complex, look at what it takes to achieve significant, lasting health results in the public eye. Her story continues to evolve, but her current focus remains firmly on her health and family.