From posing in front of the Scooby Doo Mystery Machine to a hilarious Kickin' It reunion, there was a lot going on Instagram this past week. Stars like Alli Simpson, Olivia Holt, and the cast of Pretty Little Liars were definitely feeling silly enough to 'gram crazy pictures. But now it's up to you to decide which celeb has the best silly pic.
Click through the gallery to see all the week's silliest photos, then vote in the poll below for the one that's your fave. Tell us in the comments: Who did you vote for?