How to download free music onto my iphone 5c?

Itunes is so expensive and want to download loads of music.

At your computer, you can download music via YouTube into iTunes. Then you may connect your iPhone into your computer. Then, it will automatically import the all of your music.

Music is not expensive compared to you £500 toy phone.

Would you steal someone's iPhone from them?
If not, then why steal music from the Artists and Recording Companies?