Chace Crawford and Taylor Momsen Hook Up

 Image by Splash News

We're starting to think the cast of 'Gossip Girl' either work too much or they don't understand the concept of dating outside outside of work. Chace Crawford and Taylor Momsen are the third couple on set that are hooking up in real life too.

Chace and Taylor were spotted at a holiday party at Haven on East 51st Street playing tonsil hockey in the corner, according to spies at Page Six.

If they're already making out at work (above photo) why not throw in a few more make out sessions outside work? Maybe they were 'rehearsing' their lines.

Last week fellow cast members Ed Westwick and Jessica Szohr were also caught making out at a Dallas airport waiting to catch a flight back to New York.

Clearly GG's original couple Blake and Penn have set an example for the rest of the crew. Hey, it's the holidays, they probably figure why date when you can just hook up with cast mates you're already hooking up with at work.