Which fabric should I use for binding?

[mochi]

Hi everyone,
I'm almost finish making my first baby quilt for a friend out of 4 different hello kitty fabric. But now I'm stuck, I'm not sure which fabric to use for the binding. I still have the pink Hello Kitty Fabric that is cotton and the back fabric which is a white fleece like fabric with stars on it but if I can easily pick up more of the other fabric if you guys think I should use that for the binding.

Thanks in advance for all of your help!!!

j