Britney Spears On Glee Tonight

When Brittany and the gang try to convince Mr. Schuester to let them do a Britney Spears number, he is reluctant to go that edgy. Meanwhile, an insecure Will is curious about Emma's new beau, Dr. Carl Howell (guest star Stamos), so he convinces her to bring him in to talk to the kids about dental hygiene. While the dreamy doc inspires the girls to take their dental health more seriously, Will is left feeling worse than before in the all-new "Britney/Brittany" episode of GLEE airing Tuesday, Sept. 28 (8:00-9:00 PM ET/PT) on FOX.

"Working on GLEE was an amazing experience," said Spears. "The cast is so talented, and I really had an incredible time working with Ryan Murphy."