I can't open my music on my iPhone 5 because I need to update to iOS 9 but the update isn't working?

Ugh i'm so annoyed right now! I can't open my music. Everything works fine except fo my fkn music! Everytime I tap the music icon it just shows up as white then it gores back to the home page in 2 seconds. I read that my phone needs to be updated but the update ist even working! Ughh help please I can't live without music when i'm running

IPhones are stupid