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Seth Rogen, Chloë Grace Moretz, And The Cast Of "Neighbors 2: Sorority Rising" Partied Live On The Red Carpet

Jell-O shots + flip cup + Zac's abs = oh my.

by Lindsay Farber, Christian Zamora, April Salud, Brent Bennett

WE THREW A FREAKING PARTY.

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Valerie Macon / AFP / Getty Images

What happens when you mix Jell-O shots + flip cup + Seth Rogen + a red carpet premiere? A college rager on BuzzFeed Celeb's Facebook Live...DUH!

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We had a blast partying alongside some of Hollywood's most hilarious stars at the premiere for Neighbors 2: Sorority Rising and let's just say — we're HUNGOVER AF.

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(It's more of a mental hangover.)

There were laughs...

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There was fashion...

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There were games...

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And many a conversation regarding Zac Efron's 19 abs and counting...

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In case you missed out on the fun, check out the video above and make sure to subscribe to BuzzFeed Celeb on Facebook for more live red carpet moments!