Pontiac G6 Brake Noise

Hello...the Other Night I Was Driving Home And It Was Very Foggy Out. I Accidently Ran Over A Tree Shrub On The Road And Now My Car Is...

My Car Is Making A Squeling Noise Anx It Sounds Like It Is Comming From The Front. When I Apply The Breaks It Stops,

When Ever I Drive It Makes A Squeeky Noise. The Brakes Disks Have Been Changed Out What Else Could It Be. I Go To The Mechanic And They Tell...