American Idol star Kayko calls Ryan Seacrest his “Dad” – despite the host having no children – but it was a simple joke. His real father watched the singer’s audition from home with pride. Kayko, a songwriter and producer from Fort Lauderdale, Florida, sang his original song called Over You. “You’re going to be a megastar!” Katy Perry said during his American Idol performance. American Idol star Kayko’s REAL dadKayko’s real father is “iconic” and proudly watched his son’s audition from the comfort of their home. Sam “Kayko” Kelly-Cohen came to Idol as an accompanist for his friend, but then he…