Head liner is rattling

Today my car started having a really loud, annoying rattle whenever it rolls over the slightest bump. It sounds like coins rattling in a jar. At first, I thought it was coming from the dash then I realized it is actually coming from the head liner, near the windshield, just in back of the rearview mirror.

If I push my hand up against that area, where the interior light is, the sound stops. The liner is obviously coming loose from the roof at that point. The car is a 2002 Grand Prix SE.

Does anyone know a good way to fix this? The noise is driving me nuts!

Thanks!

Just pop out the lights with a large flathead screwdriver, and take alook up there. Soo if anything is rattling.