Teen pop star, Justin Bieber, 17, made an appearance on the David Letterman Show in New York and slammed claims he impregnated a woman named Mariah Yeater, 20, after one of his concerts. Bieber, who seems to be taking this all in stride and laughing a Yeater, called her a weasel. Yeater clearly has a fantasy going that there is a connection between herself and Bieber and will probably start crying hearing him say that. She's dragged his name through the mud, so I don't think he cares at this point.