Kristin Cavalleri of Laguna Beach will play Lesbian

According to E! Online, "Kristin Cavalleri of 'Laguna Beach' will be guest starring on Veronica Mars. She will be playing a closeted lesbian cheerleader who turns to Veronica when a blackmailer threatens to out her and a number of other gay students at Neptune High. The episode tapes next week and will air in February. Kristin is also hosting a UPN reality show called "Get the Party Started," so this is something of a crossover."

Source: E! Online