Everyone knows Ellen DeGeneres loves pranks. So of course she had to pull one on the K-Pop band BTS when they visited her show on Friday. As Billboard reports, the members of the Korean boy band were nearing the end of a shriek-filled interview (man, those fangirls can scream!) with DeGeneres when all of a sudden, someone in a blonde wig popped out at them. The boys were completely shocked. It turns out one of her staff members--dressed as a fan--jumped up from the side table next to them.