Hey there, hot mama! With such a rockin’ bod, there’s No DoubtGwen Stefani looks half her age. Known for dropping down and doing pushups during live performances, the 43-year-old sexy singer has always worked tirelessly to stay in tip-top shape. “There is no secret: You just have to eat healthy, work out, and torture yourself!” she told Harper’s Bazaar. From high-intensity weight training and a mix of cardio to a low-carb, low-sugar, low-fat diet, Stefani is “The Real Thing” when it comes to healthy living.