How's this for a diet: low-carb bagels, bread, chips and cookies. These days, if you can take a carb out of it, dieters will buy it. And they're thrilled with the idea that they can eat steak, cheese and other high-fat foods and still lose weight –- if they avoid carbohydrates. Correspondent Susan Spencer talked to the Stella family of Norwalk, Conn., who decided to try out the low-carb diet. Jared Fogle, 26, is best known as "The Subway Guy," after the brand of sandwiches that he says helped him lose 245 pounds in a year. "I never expected any of this. I never expected to be well known. I never expected anyone to ever know what I did," says Jared. Six years ago, as a junior at Indiana University, Jared weighed a staggering 425 pounds. But now, as Correspondent Richard Schlesinger reports, he's a celebrity because he's lost weight. Actor Wayne Knight says people often act shocked when they see him. He is, after all, now a far cry from his former chubby self, and his most famous role as Jerry Seinfeld's hefty nemesis, Newman. "He's the guy who's always trying to slip in the door and nobody wants him to come in," says Knight. Since Seinfeld closed the door on Newman for the last time in 1998, Knight has shed nearly 100 pounds, not through gastric bypass, but the old-fashioned way. He decided to exercise more and eat less. And he's had lots of help along the way. Correspondent Susan Spencer talked to Knight. "American Idol" judge Randy Jackson lost more than 100 pounds after weight loss surgery. So did singer Carnie Wilson, weatherman Al Roker and MTV's Sharon Osbourne. It's the kind of advertising money can't buy. But are unskilled doctors costing some patients their lives? Correspondent Harold Dow reports.