The cast of "Glee" won't be belting out any big numbers this weekend.

According to Entertainment Weekly, production Friday on the hit show was put on hold until Monday due to an outbreak of tonsillitis among its crooning castmembers. The crew was reportedly toiling away on a musical number slated to appear on an episode following the Super Bowl in February.

Although EW didn't specify which stars were ailing, Dianna Agron blogged about laid up in bed with an illness.

"Note to self...should have gotten a flu shot," she wrote Friday. "In bed, hoping that medicine, soup, my computer and a marathon of movies will be the cure."

The break will be brief, however, as the show is expected to resume production on Monday.

Details about the forthcoming Super Bowl episode have been trickling out recently. The "Glee" cast will reportedly take on Michael Jackson's game-changing smash "Thriller" and mash up the track with another soon-to-be-revealed hit. Jams from the Black Eyed Peas, Katy Perry and Lady Antebellum will also be revamped by the McKinley High kids.

A recent on-set snap of Lea Michele may also give another clue about the upcoming episode. Michele, who plays songbird Rachel Berry, was shot decked out in football gear earlier this week. In August Michele revealed her dream guest star for the Super Bowl episode: Justin Timberlake.

"I think they are saving Justin Timberlake for the Super Bowl episode," Michele told The Hollywood Reporter. "They have to be, because he is so perfect for our show. He has to be on it! When I met Jessica Biel, like a loser, I asked her to tell Justin to come on our show. [Laughs.] She was a little taken aback and said, 'Um, OK. I'll tell him.' "

Are you looking forward to the post-Super Bowl "Glee" episode? Let us know in the comments!