How to Download free songs on your iphone 4s?

Help

Download on your computer and transfer to iTunes

I can advise to do it only via your PC:
1. Download the program YouTibe to iPhone Converter from this page:
http://www.dvdvideosoft.com/
2. Start downloading and converting, choose your iPhone in the settings.
3. The files will be added to a new iTunes playlist and you can sync them with your iPhone.