Lea Michele Dishes on the 'Scream Queens' Finale and Why Hester & Rachel Berry Would Be Unstoppable!

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Listen up, Divs!

Oh, you don’t know what a div is? Well, thanks to tonight's insanely epic two-hour Scream Queens finale, it's going to be your new favorite Chanel Oberlin-inspired insult.

The killer conclusion to Fox's smash thrilledy begins tonight at 8 p.m. and it's guaranteed to make you scream with delight and then cry ugly Chad-loving tears as we say goodbye (for now!) to some of our favorite characters.

To get you pledges even more pumped for the season finale, ET caught up with star Lea Michele to get the inside scoop on the "killer reveal," and the one outrageous Hester quote that made her blush for days.

Plus, we found out what would happen if Michele's two on-screen alter egos -- Glee's Rachel Berry and Scream Queens' Hester -- were to come face-to-face and why that twosome would be a killer combo!

WATCH: The 'Scream Queens' Cast Is Obsessed With Lea Michele's New Role

"It's been such an incredible season," Michele dished to ET in our video above while looking sensational in a blood red cape blazer. "[Executive producers] Ryan [Murphy], Brad [Falchuk] and Ian [Brennan] did it again with such an amazing show and I think that the finale is just probably our best yet."

"Expect a lot of craziness!" she warned. "I think [there are] a couple more murders and then the killer reveal in the finale hour." Say it with us, "Dun dun duuuun!"

Just as we promised before Scream Queens even premiered
, Michele's role as Hester will go down in history as one of the best TV characters of all time. From her bedazzled neck brace, to her silent yet celebratory fist pumps, and her exploding insults -- she has become the ultimate Kappa scene stealer.

But there's one Hesterism, in particular, that was Michele's favorite out of the entire season: "Attack my crack," the brunette beauty said with a giggle. "I feel like I can't even say it. It's not really [that bad] but even when I say it I just blush!"

"Coming from so many seasons of doing Glee and getting to play Rachel Berry was such an amazing opportunity," Michele explained. "As an actor, I think there is definitely an issue with people having seen you play someone else after being a part of a show for such a long time. But I think that once the "attack my crack" line happened, it wasn't an issue anymore."

WATCH: Lea Michele & Ariana Grande Show Off 'Scream Queens' Killer Set

Now that we have had a full season to get to know Hester and digestthe full, death-obsessed psychosis of Hester, we asked the question that has been on every Glee fan's mind: What would happen if Rachel Berry and Hester were to come face-to-face?

"That's so funny!" the 29-year-old actress exclaimed. "A lot of people have asked me that lately, and I think that anybody that Rachel doesn’t have to compete singing with, she will definitely treat a little bit easier, so that's a good start."

"Other than that, I don't really think that they would know what to do with one another." Michele pondered. "But they both [have] extreme determination, so I'm sure if you put those two together to get something done, it would happen with great success."

Press play on the video above for an exclusive sneak peek from tonight's two-hour Scream Queens finale airing tonight at 8 p.m. ET/PT on Fox. Plus, make sure come right back to ETonline after the episode for an exclusive video from the Red Devil Killer!