Won't Shuffle

I listen to my iPhone's iPod practically everywhere I go. Car/Work/Home/Exercising etc. And I always use shuffle.

For some reason today, it won't shuffle. I'll choose a playlist or genre and hit shuffle. It will pick a random song for the first one, but then it repeats that same song over and over.

I have tried a hard reset by holding the home and hold button till the apple came up, and it still does the same thing. Short of restoring it all through iTunes, does anyone have any ideas for a solution?

Thanks!