I'm assuming it's really stuck, and not only will it not play the song it's stuck on, it won't do anything else? Does it do anything when plugged into the computer? If not, my suggestion would be to remove the battery off the back for a minute and put it back on. This has the effect of a "reset" and might help.
i have a SanDisck mp3player model m240 and when i cut it on it is just stuck on a song that will not play it is not on stop or pause and the hold button is off.
please help me out on this because i can not figure out what is wrong with it.