Sky and Stars

How can I get stars to render only in a specific Render layer? I have created a scene with multiple render layers, only one of which has the sky enabled(Stars are enabled).However,when I render the scene the stars are applied to each render layer not just the one with the sky set up. Does anyone know how to fix or work around this?

What you can do is just create another scene and have the stars only in that scene. Then in the nodes section grab that scene and use the stars for the back ground in your other scene.

Ok, it worked.
Thanks