I only hear the instruments not the lyrics

loisneely, try a different set of headphones and see if that makes a difference. If that does not make a difference you may have to check your setting and reset to default and/or do a restore with iTunes. Of course make sure that all your music etc. is backed up. the other possibilities are a bad head phone jack and messed up equalizer settings.

So, check your headphones, check your equalizer settings, reset your ipod, restore your ipod, repair headphone jack (major stuff)iPod Nano 5th Generation Logic Board Assembly Replacement so think positive and get going on it and let us know how it turns out.