Can I transfer music from my iPhone to my iTunes?

I got an iPhone 5, and I downloaded music onto an app. Could I sync the music from my iPhone onto my library without messing with the music already on there(from my iPod)?

There are lots of videos on YouTube
http://www.youtube.com/...tunes&sm=3

Merry Xmas. Yes, you can do that. If your songs are all purchased from iTunes store, Plug in iPhone to computer, then go to iTunes menu "File-> Transfer purchases", It will copy your bought songs from iPhone to computer. This way is not work for the CD ripped music and website download music. But you can follow this step by step guide to transfer all the music from iPhone/iPod to iTunes, including the non-purchases songs. It's easy to understand and works pretty well for my iPhone 5.

http://www.ipod-transfer-copy.com/how-to-transfer-music-from-ipod-to-computer-itunes.html

Hope it helps. Feel free to email me if you need further help.