Back in 2013, Beyonce joined husband Jay-Z on a 22-day vegan challenge, which was created by her trainer, Marco Borges. During the challenge, Bey indulged in healthy, meat-free meals like vegan bolognese, indian-spiced chard, and pumpkin soup. After workouts, she went with a plant-based option, like asmoothie made of pea protein powder, almond milk, frozen fruit, andspinach.

"The weight stayed off," she said on Good Morning America. And a slimmer frame wasn't the only benefit. "I felt like my skin was really firm, a lot more than when I restricted myself," she added.