"Fun Size" star Victoria Justice at Mall of America on Saturday.

VIctoria Justice and Thomas Mann, who star in the Halloween comedy "Fun Size," opening Friday, were at Mall of America Saturday with singer Carly Rae Jepsen, who had a concert that night at Target Center with headliner Justin Bieber. Concert review here.

They appeared at Nickolodeon Universe, to meet-and-greet fans. The three stars signed autographs, met with their fans and also exclusively debuted Carly Rae Jepsen's new video "This Kiss," which will be seen by audiences in theaters this weekend ahead of the debut of "Fun Size."

Jon Bream talked to Jepsen for a recent story.

Look for a review of the movie on Friday in Star Tribune.