AceShowbiz -

The full line-up of judges at the upcoming Nationals singing competition on "Glee" has been revealed. Following the casting of Lindsay Lohan, it's now reported that blogger Perez Hilton and former "Entourage" actor Rex Lee will sit beside her in the scene that will be featured in the show's season 3 finale.

According to E! Online, the threesome are scheduled to film the scene later this week. Gushing about the "Georgia Rule" star's role, sources told the site that the 25-year-old actress "has some funny moments as she plays a 'heightened' version of herself, including being disappointed she doesn't get a red chair that whips around like on 'The Voice'."

Lohan will reportedly also have a long speech, "where she talks about kid performers, and how hard they work, and how much she supports the arts." Previously, she was said to have a "full scene" and it's "meaty."

The third season finale of "Glee" is slated to air Tuesday, May 15. Prior to that, the show will pay tribute to the late Whitney Houston in an April 24 outing titled "Dance with Somebody". The New Directions kids will cover songs from the "Bodyguard" actress' catalog, including "How Will I Know", whose cover version is sung by Amber Riley, Lea Michele, Naya Rivera and Chris Colfer.