Get yourself GG edjumacated, friends! Learn about all the cultural references (pop and otherwise) you might have missed during the show. If you don't know, now you know....
Credit: Giovanni Rufino/The CW ©2010 The CW Network Photo: Lily and Rufus with Isaac Mizrahi in Episode 4.6, "Easy J"
Wait Until Dark
Why was Blair stumbling around in her nightmare, clutching at shoes? Because the particular Audrey Hepburn character she was inhabiting this time is blind. In 1967’s Wait Until Dark Hepburn played Susy, a blind Greenwich Village housewife who unknowingly comes into possession of a doll full of smuggled heroin, and has to foil a gang of crooks to get it back. We don’t remember any of them wearing jeweled headbands, however.

Tim Gunn
Tim Gunn’s identity is definitely something you need to know. However, we’re guessing it’s something you already do know — any fan of Gossip Girl is surely a fan of the Project Runway fashion guru and his famous catchphrase, “Make it work.” However, what you may not know is that the offscreen dramz during his Gossip Girl shoot were at least as scandalous as Blair’s WHORE dresses. See, it turns out Taylor Momsen (Jenny) did not make a very positive impression on Mr. Gunn, who called her “pathetic” and a “brat” because she didn’t know her lines.

Isaac Mizrahi
This episode was so studded with cameos that we didn’t even know that Isaac freakin’ Mizrahi was going to be on. No shock that designer Mizrahi and Tim Gunn didn’t share any scenes, though — Isaac is one of the hosts of Bravo’s The Fashion Show, which they launched to replace Project Runway after it (and Tim Gunn) fled for Lifetime.

Jared Kushner and Ivanka Trump
That attractive couple air kissing with Lily are, basically, the real-life Chuck and Blair. Ivanka is the daughter of Donald Trump, and works for him in administering his corporate empire. Kushner is the son of real estate magnate Charles Kushner. He also owns the New York Observer, the real newspaper that threw last night’s fake party.