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Kim celebrated her 31st birthday yesterday and I know we’re all curious to know what kind of craziness she stirred up! We’re gonna have to wait to find out about the big Vegas bash at the Marquee nightclub because Kim spent her actual birthday in New York City with her family. Kim visited the Natural History Museum with her sister Kourtney and little Mason.

What do you think will happen at main event in Vegas? Let us know on Twitter!