Why wont Ipod touch sync all songs?

Hey, I have a solution :), When you finish downloading the songs, Have the download screen open where the songs have been finished downloading. Or find the songs/videos that you want to sync on iTunes. Now you need to go plug in your iPod into your computer and Click on it under devices. In the summary tab, check the box that says "Manually manage music and videos" Now go back to iTunes where your songs or videos that you wanted in your iPod were. Simply drag it into your ipod that you see in iTunes. Now the song should be synced onto there. When you are finished go back the iTunes and uncheck Manually manage music and videos so that everything is back to normal. Good luck. Top Contributor, i♥Bieber☆

on iTunes you have checks by songs, and if you haven't changed your settings it'll only sync checked song, so you either have to check the songs or change the settings to "sync all songs". at least that's the only solution I can think of. hope it helps!

I am curious if your music is all from cd's you loaded into itunes or all from download purchase from itunes store, or a mixture.

try restoring your iPod