“I’m a big lunch eater,” shares Kathie Lee. “I’m not a big snacker and I don’t eat dinner. I eat a big spoonful of peanut butter at the studio when I get there, then I have anything I want at lunch. I love fish, so often it’s seafood. It works for me.” Why she’s smart: Harvard research shows that consuming calories during a limited time frame forces the body to burn stored fat for fuel—an effect shown to help dieters lose 55 percent more weight.