Olivia Khaw, 15, is as diehard a One Direction fan as they come, creating the ultimate shrine to the British boy band with hundreds of pictures of Niall, Zayn, Louis, Harry and Liam all over her bedroom walls. The Aussie teen enlisted her mom to help with the project, but little did she know that her parents had different decorations in store. Khaw’s parents, who “both have a fantastic sense of humor,” her sister Rebekah Khaw explained to GoodMorningAmerica.com, couldn’t resist the urge to alter the photos once Olivia left for work. They recreated some of the boys’ pictures with their own self-portraits and discreetly swapped them to surprise their unsuspecting daughter. “Olivia found them the same day the imposter pictures were put up, within half an hour of coming home from work and came running down the stairs laughing,” Rebekah wrote. “We all could not stop laughing for a good five minutes.” Take a look at the prankster parents’ handy work.