Celebs share tons of style transformations with their fans via their social media pages, so it's easy to believe them when they totally trick us with playful hair pranks. Case and point: Ariana Grande completely fooled her fans over the weekend when she shared a cool Twitter pic of herself rocking vibrant turquoise hair! The photo turned out to be a Photoshopped edit, but it didn't stop us from totally freaking out when we saw the new pic.
Ariana's not the only star to have some fun with her fans when it comes to playful photo shares. Stars like Harry Styles, Demi Lovato, and Selena Gomez have all shared OMG-worthy snaps of their hair makeovers only to later reveal they were just playing around!
Click through the gallery below to see 13 celeb hairstyles we totally thought were real ... until the celebs themselves 'fessed up! Which hair pic had you fooled? Tell us in the comments section below.