Good Custom Music Shuffle App

Hi guys,

I'm looking for a nice simple app where I can customize the shuffle for the music in my phone. Most of the apps I've tried only let me shuffle the entire library, or the all the albums for an artist, or only one album. I want an app where I can select which albums I want to add to the shuffle list. It's something really simple, but I can't find any app where I can do that. Do you you know any? Thanks.