Does listening to music on my iphone uses my data?

So I have just downloaded itunes and put music on my iphone through it, now all my songs are under the folder 'music' on my iphone.
But because I used Itunes and it's from my itunes playlist, will it use my internet data when I listen to music?

NO! As long you already download it it will bot cost you anything from your data. Unless your using a live streaming like pandora app.