Knock Noise

I have a knocking noise coming from the front of my car. Only happens when I'm goin 35 or under, and when I start to apply the brake it stops immediately. Any ideas as to what this could be? I don't think its anything loose in the brakes. Maybe a bad joint or what?

I think somebody else had this prob. u might search the forum... Umm, Is it a loud clicking or quite clicking? What kind of wheels do u have on it? If its the plastic cap wheels, it could have a rock in it...bearing wise, not sure go to the front side of the car that the sound is coming from and push down on the fender and listen good for the clicking then.