Lindsay Lohan has been hospitalized in Los Angeles with an "undiagnosed illness" that may or may not be meningitis. After feeling ill for several days, the 18-year-old Mean Girls actress was admitted over the weekend with a temperature of 103. The illness forced Lohan to postpone a guest spot opposite real-life boyfriend Wilmer Valderrama on Fox's That '70s Show, as well as the filming of her new movie, Herbie: Fully Loaded. Meanwhile, The Insider reports that Lohan's messed-up family has flown in from New York in an effort to make things worse.