'Glee': Heather Morris was dying to sing Britney Spears!

Heather Morris, formerly Beyonce's tour dancer who actually taught all the "Glee" kids how to do the "Single Ladies" dance, pulled off a great Britney Spears on the much anticipated Britney tribute show.

Britney herself was (somewhat surprisingly) hot enough. But Heather (whose character on the show is named Brittany) as Britney Spears? Hamazing!