Taylor Swift will guest star in an upcoming episode of the CBS-TV series, CSI: Crime Scene Investigation. The 19-year-old singer-songwriter will portray Haley Jones, a teenaged girl whose family runs a seedy motel in Las Vegas. According to the plot synopsis, "Over the course of a year, Haley goes through a series of changes that have tragic consequences." Although Swift appeared Saturday (Jan. 10) as Little Orphan Annie in a Saturday Night Live sketch that coincided with her musical performance on the comedy show, the CSI episode marks her first major acting role. Her CSI episode has not yet been shot, and an airdate has not been determined.