Sometimes I do not listen to the entire song and want to skip to the next song. with the touch you have to unlock the thing every time you want to go to the next song. what a pain.
double tap your home screen (even when it is locked) ; you will see a previous and next button, click the next button you are off to the next song!.
not many folks realized this trick including me; i just learned that when my 3 year old niece playing with it (and she got the buttons working when i thought it is locked and she cannot do anything with it