GSR2IS300

I feel good that I'm not the only one. That is wierd that is a "normal" sound coming from a Lexus. I wonder if there is anyway to fix that?

When I first put the car reverse or drive after I start it and I begin to pull out or back out, the first time I tap the brakes there is a loud clicking sound that sounds like its coming from all sides of the car. It only happens when I first start driving, the first time I use the brakes, but after that I don't hear it anymore. Any ideas?