From Wikipedia, the free encyclopedia Kathleen McClellan is an American actress, model, television host and former Miss Illinois Teen USA. She is perhaps best known for her role on Seinfeld as Melissa, Jerry's naked girlfriend, and for her 2002-2004 role as the host of TLC's For Better or For Worse. McClellan grew up in Bloomington, Illinois. In 1988, she was crowned Miss Illinois Teen USA, was named Most Photogenic in the National Miss Teen USA Pageant, and was signed to Elite Model Managemen ...