Jason AlexanderJason Alexander recently joined a line of Jenny Craig celebrity spokespeople. Since signing up in January, the former 'Seinfeld' star has lost 12 pounds on the program and continues going strong.

Alexander talked with PopEater about his diet, why he chose Jenny, and how he will resist temptation at a Super Bowl party.

"All the crap at a Super Bowl party, they sing to my heart. That scenario alone, it's a hard day," he tells us. "I know that right now the things that are making me happy are the way I look, the way I feel, the way I'm breathing, the clothes that are fitting, the things that people are saying to me, the relative speed with which I'm getting to goals. Those are so rewarding that I could muscle it through for a day," he adds.