Hi lads im 17, right and my dad bro ses im gay for liking Leona Lewis and her music?? Why though is it gay?

Does anyone else like her here, im not even gay i dont get whats up with him, i like most artists like snow patrol, lady gaga, kelly clarkson so whats with this about bein gay if i like people like Leonas' music... Any other men here like her that r str8. . thanks for helping me out i just got a bit annoyed l ol .