I agree with Darkwriter, I would bet it's the balljoints.....Mine did it REALLY bad from the right side and I changed the balljoint, actually changed the whole control arm since I got new ones cheap and thought it would be easier and now it's gone, it's the only thing I can say that makes a pop.
My left side is doing it now but not so bad.......I'm doing it soon, one of the cars from my work came in with a balljoint that came apart..and it happened to one of my friend's stangs and it was making the same described noise as you and me...he made a turn into a food mart and once he hit the slight bump going into the driveway the weight of the left corner of his car dropped on his front left wheel and was rubbing.