Britney Spears & John Stamos on Glee Tonight!

Britney Spears & John Stamos on Glee Tonight!The  much anticipated Britney Spears episode on Glee will air tonight. They perform some of Britney's most famous songs including "Toxic," "Baby One More Time" and "Me Against The Music." Britney also makes a cameo appearance in the episode.  Actor John Stamos also makes a cameo as a dentist and psychologist Emma’s love interest. Glee cheerleader