EXCLUSIVE: 'Glee' Sneak Peek: Get Ready for Flashback Fun in the Series Finale!

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Grab your suspenders, and put those cool blue extensions back in your hair because we're in for the most amazing Glee flashback in the history of the series!

Have you ever wondered why the other members of the New Directions -- Artie, Tina, Mercedes and Kurt -- decided to audition for Glee club in the first place? Well then get excited, Gleeks because this Friday's all-new episode, "2009" answers exactly that.

We at ETonline have already seen the first flashback-centric episode of special two-hour series finale, and let's just say that after falling in love with our core character all over again, you'll need an entire box of tissues to help you say goodbye. (We're not ashamed to admit that we were full on ugly-crying.)

To get you prepared for the best episode of the season, (the Glee double wedding is a super close second, natch) we have your second-to-last exclusive sneak peek!

NEWS: 18 'Glee' Cast Secrets to Know Before the Series Finale!

"It is a flashback of what happened during the pilot that we didn’t see," star Kevin McHale spills in our first look video above. "It's kind of fun to get to see why everybody signed up for glee club, and to audition in the first place because in the pilot you just kind of jump into it."

Jenna Ushkowitz adds, "We're going to see how we all started."

To make matters ever more exciting, fans are finally going to see the songs that song of your favorite New Directions auditioned with. Spoiler Alert! Artie's rendition of "Pony" by Ginuwine is the best thing you're going to see all day.

Make sure you check back to ETonline on Wednesday, March 18 for your very last Glee sneak peek of all time!

Glee's two hour series finale airs Friday, March 20 at 8 p.m. on Fox.

Are you ready to say goodbye to Glee? Who else is already starting to tear up? Share your gleemotions with @LeanneAguilera on Twitter!

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