Mariah Carey – Diet & Exercise / 45 pounds

Since her debut single in 1990, Mariah Carey has never left the music charts, and she is actually one of the most successful female singers America has ever witnessed. Her amazing voice still captivates every music lover. In 2008, Mariah married Nick Cannon, and after being a mother for the first time in 2011, she gained 70 lbs due to her pregnancy. She started eating healthier and working out, swiftly dropping 45 pounds and returning to her curvaceous shape. The couple divorced in 2014 and Carrey gained a few pounds, but it seems they suit her just fine.