Q: missing songs

Hi andread2002,

Thanks for visiting Apple Support Communities.

If the songs from your library were purchased from the iTunes Store, you may be able to download them again by following the steps in this article:

Downloading past purchases from the App Store, iBookstore, and iTunes Store

http://support.apple.com/kb/HT2519

If the songs were from another source, the information in this article may help with locating them:

iTunes: Finding lost media and downloads

http://support.apple.com/kb/TS1408

Cheers,

Jeremy