Katy Perry recently took time out of her busy touring schedule to visit a sick fan who was unable to attend her concert in Adelaide, Australia. The pop star visited 8-year-old Grace Moores, who recently underwent surgery for a brain tumor, after learning of the #HelpGraceMeetKatyPerry campaign on Twitter. “RETWEET PLEASE! My baby sister is meant to attend @katyperry concert in Adelaide this year but was diagnosed with a 6 c.m. brain tumor and has been battling all year. Grace has love been Katy’s biggest fan since she was 3, please help us try and get in contact with @katyperry xx,” Grace’s older sister Tiana wrote. Perry took to Instagram on Thursday to share a video of her meeting Grace. “The power of the internet,” she captioned the clip. It shows Perry visiting a visibly shocked Grace. Another clip shows her sitting on Grace’s couch and singing “Roar.” She even dances with the family dog as Grace shyly smiles and looks on.