The Insider.com

Nickelodeon Victorious star Victoria Justice plays a teen whose popularity is in jeopardy when she is forced to track down her kid brother instead of going to THE Halloween party of the year in the funny and outrageous Fun Size -- and we have a look behind the scenes!

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Video: 'Fun Size' Fun with Carly Rae Jepsen!

In theaters today, Fun Size follow's Victoria's character, Wren, whose big plans are ruined when her irresponsible mother (played by Chelsea Handler) heads off to her own Halloween party and leaves Wren to look after her little brother Albert (Jackson Nicoll). But when Albert is lost in the shuffle while trick-or-treating, Wren's rush to find him with her nerd neighbor ultimately proves that popularity might not be exactly what she really wants.

Video: 'Fun Size' Costumed Craziness

Jane Levy, Johnny Knoxville, Thomas Mann and Ana Gasteyer also star.