how do I get songs off of my nano 4th generation

The following user tip is worth checking through:

Recover your iTunes library from your iPod or iOS device

iPod data recovery software support Windows based operation system with all Apple iPod models such as iPod Shuffle, iPod Nano, iPod Mini, iPod Touch, iPod Mini.

iPod data Recovery software restore all songs, photos, pictures, images, music & videos files from corrupted, formatted, deleted or inaccessible iPod drives.

iPod recovery software embedded with a graphical user interface, that features gives the user to access the software very easily.

There is no technical skills required to access the iPod data recovery software.so Check out the FREE trail version demo in which user can recover its data in free: http://www.recoverfilesdata.com/itune-data-recovery.html