Need a hand with my lexar mp3 player

I have a http://reviews.cnet.com/4505-6490_7-31266276.html?tag=also
and its been friggin AMAZING until now. out of nowhere is decided to turn into a karaoke machine…all the songs have the lead vocal tracks almost silent and some other sound issues. (werid distortion with the remaning vocals , sounds like they are massivly reverbed)

google is no help at all, any suggestions?