How to remove/reset mp3 from ipod?
Go to settings, general, usage, music, swipe across all music and tap delete. If that doesn't work, try restoring it in iTunes. Plug it in and turn your iPod off, then hold the power and home buttons for eight seconds(a little bit after the screen turns black again) then release the power button but hold the home button for about seven seconds, or until iTunes recognizes it and tells you to restore it. After it is restored you will be able to restore your save data with iCloud if your device runs ios 5.If it doesn't, wait for another answer.