HI all,
I have this really weird (well, more like annoying) habit where i raise my pink up tensely during intensely fast scales. I've been trying to fix this by trying to move my fourth finger independently and concentrate on not moving the pinky...but that is almost impossible without physical force.
How should I practice to avoid lifting my pinky??? and to have faster, clearer , evener scales in general? 
How is your pinky, in general, when playing scales slowly? Is there any tension? Do you have a habit of straightening it out while playing or is it always nicely rounded and relaxed? If there is any hint at all of your pinky straightening out and tensing while playing slowly, this will be compounded when you play more quickly. Pushing yourself to play quickly can create tension in other areas of the body so if there is already a tendency in one area of your body, it may worsen.
The very fact that you are aware of this tension suggests that you can now begin to release it!
My suggestion would be to play scales slowly while keeping your focus on relaxed fingers. I don't mean sloppy fingers, they should still be reasonably firm, but ensure they are relaxed and rounded over the keys. Then, when you are able to do this slowly, VERY gradually begin to increase the speed, each time checking that little finger. If it straightens, slow down and deliberately relax it. Very, very gradually increase your speed. You will need the utmost patience for this because I'm talking VERY gradually here.
You are already well on your way to overcoming this simply because you have become aware of it. Now it's up to you to control it, with patience and RELAXED determination. My little finger used to rise every time I played a trill. When my teacher suggested putting a flag on it, I began to focus on the problem and it disappeared very quickly.