Rebel Wilson, who has been open about her weight loss over the years, says people don’t actually need as many calories as they believe. “I was just actually in a program where I learned about food, and they taught us that you don’t really need as many calories as you think,” the “Pitch Perfect” star told the Daily Mail Thursday at a launch party for her Fluid dating app, which Casamigos hosted at Funke in Beverly Hills, Calif.