Khloé & Kourtney Throw Themselves a Book Release Bash!

Jason LaVeris/FilmMagic

11/21/2011 AT 5:55 AM ET

Kourtney and Khloé Kardashian hosted a Gilt City-sponsored bash at a private apartment in N.Y.C. in honor of their debut novel, Dollhouse. The sisters smiled and snapped pictures with fans, who enjoyed a Central Park view and macaroons from Vendôme, as well as cocktails. “They were smiling and laughing with everyone,” an onlooker says of the two. – Jennifer Garcia and Jessica Wedemeyer

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