Lea Michele and Cory Monteith Lea Michele and Cory Monteith

Graduation is just around the corner on Glee. But before the New Directions seniors sport those ugly cap and gowns and grab their McKinley High diplomas, they've got to get down with the get down at prom.

Glee spoiler photos: Get a sneak peek of what's ahead

In these preview images from next week's episode, entitled "Prom-asaurus," most of the glee club gang (even Mr. Schue!) can be seen at the big dance. So who will perform? Who looks shocked...and why? And most importantly, what is everyone wearing? Find out all that and more by checking out the spoilerific photos here.

What do you think of the glee club's prom looks? What songs do you want them to perform? Sound off below!

Glee airs Tuesdays at 8/7c on Fox.