American Idol Katy Perry surprises young fan who has brain tumor 08/03/2018 Katy Perry put on a surprise show in Australia for a young fan with a brain tumor. Read More RELATED NEWS 'American Idol' couple Gabby Barrett and Cade Foehner expecting their first childKaty Perry honors late friend and mentor: "I am incredibly grateful"Bobby Bones joins 'American Idol' as in-house mentor for Season 17 TAGS: American Idol Katy Perry
