Cory Monteith, who plays jock Finn Hudson, and Heather Morris, aka Brittany S Pierce, belt out their favourite numbers such as 'I'm a Slave 4 U' and 'Loser Like Me', which inspire their fans to live by the movie's motto: "Just be yourself."
Digital Spy sat down with Cory and Heather to find how they felt performing in front of 30,000 fans...
More Glee coverage:
> Glee: The 3D Concert Movie review
> Glee: The 3D Concert Movie in pictures
> Glee: The 3D Concert Movie: Watch the official UK trailer
> Glee: The 3D Concert Movie trailer debuts