The Insider.com

The Halloween party of the year turns into a comedy of errors in the new big-screen comedy Fun Size, in theaters Friday, and the stars of the movie along with none other than Carly Rae Jepsen made a surprise appearance at the Mall of America to preview their movie!

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Video: First Look at Carly Rae Jepsen's 'This Kiss'

Carly was joined by Fun Size stars Victoria Justice and Thomas Mann at the Nickelodeon Universe in the mega-Mall to sign autographs, meet with fans and exclusively debut Carly's new video This Kiss, which will also be seen by audiences in theaters this weekend ahead of the debut of Fun Size.

Video: Why is Carly Rae Jepsen a Stand-Out Singer?

In the funny and outrageous family ensemble comedy, Victoria plays a teen whose popularity is in jeopardy when she is forced to track down her kid brother instead of going to THE party of the year. Yet her kid brother shows her what popularity is all about -- and her rush to find her brother with her nerd neighbor shows her that popularity might not be exactly what she really wants. Jane Levy, Johnny Knoxville, Ana Gasteyer and Chelsea Handler star.