Lindsay Lohan will guest star in 'Glee.' She wont be singing during the episode, but she is set to play herself and that could provide a whole new level of entertainment! An insider at Fox says the deal is done and Lindsay will play a celebrity judge at Nationals! In past seasons, the celebrity judges at "Nationals" have been Josh Groban and Olivia Newton-John. Lindsay's episode will air in May. It's interesting that Linds wanted to be on the show after her own mother was the brunt of a joke on air. During a Glee episode Katie Couric made a joke where she informs Jane Lynch's character that she beat out Lindsay Lohan's mom and her dog Sparky Lohan to make the list of "world's biggest losers." Dina Lohan has expressed her hate for the show, telling E! News "the writers need to be nice and more creative as opposed to being hurtful." So Lindsay's cameo proves one thing, Lindsay Lohan either doesn't talk to her mom anymore, or she will just do anything to get back on TV.