It’s a sad day in the Upper East Side -- Gossip Girl has officially wrapped up its sixth. As we sit and cry into our cashmere sweaters, the cast went down a happier route and threw a wrap party in NYC that involved a little cake fight!

Thanks to Serena’ mom – a.k.a. Kelly Rutherford – we get to pretend that we at this ultimate good-bye bash with all of her Instagram pictures. We see photos leading up to the final episode as well as the messy party in Blair’s house. She would NOT be pleased.

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“Last day of filming GG… Ah! Going to enjoy every moment,” she tweeted on Monday. “Thank you all for your dedication to GG. It has been such a joy in my life ❤”

But Kelly isn’t the only one unveiled some behind-the-scenes pics! Chace Crawford posted photos on Twitter of him covered in cake and a group shot with Ed Westwick, Michelle Trachtenberg, Leighton Meester and Penn Badgley, who showed off a brand new, SHAVED ‘do! Looks like Dan needed a change.

Anybody else a little bummed nobody got a Ryan Reynolds shot? He IS Blake's new hubby.

Are you sad to see Gossip Girl come to an end? Any ideas on how the show will go out with a bang?

Photos Courtesy of Twitter and Instagram