'Gossip Girl' -- Rumors, Lies, and Swapping Sex for a Better Grade (VIDEO)

The privileged sexy teens on 'Gossip Girl' (Mon., 9PM ET on CW) expect nothing less than the very best. And Columbia University is the best -- and only -- Ivy League school in New York City. So if Serena van der Woodsen (Blake Lively) gets kicked out of the college ... well, that just wouldn't be okay, now would it?

[Warning: Spoiler alert.]

But when a fake email is sent out, Serena finds herself in danger of losing her place at Columbia. The email is sent from Serena's private account, and is written in her name. In the message, the fake "Serena" propositions one of her professors, offering a swap of sex for better grades.

But come on! Obviously the real Ms. van der Woodsen would never do that! Sure, in real life Serena actually does plenty of awful things, like sabotaging her best friends, lying, snorting cocaine in high school, and so on ... but trading sexual favors for an "A"? No way! Never!

Unfortunately, Serena only learns about the fake email when she bumps into the dean of her school at a party. The dean has the power to kick Serena out of college -- and she isn't happy about the whole "sex for grades" thing. Now, Serena has do some damage control, avoid expulsion ... and also figure out which one of her evil "friends" hacked into her email.