updated 09/29/2010 AT 9:00 AM ET
•originally published 09/29/2010 AT 9:05 AM ET
On the show, members of the glee club have Britney on the brain, and fantasize about being the pop star – thanks to the anesthesia provided by Dr. Howell, the hot dentist played by John Stamos, as he treats a few dentally challenged students.
First, Brittany (Heather Morris) performed “I’m a Slave 4 U,” complete with a sparkling bodysuit, a belly-baring outfit and a white snake. She also returned to the dentist’s office with fellow Cheerio Santana, to combine fantasies and perform a rocking rendition of “Me Against the Music,” with Santana singing Madonna’s part. Spears herself even made a cameo in the fantasy, with Brittany telling the pop star, “You’re really hot … and your breath smells really good.”