An accessory mount mountable to a roof of a vehicle with the use of an existing brake light opening. The accessory mount has a horizontal mounting surface and a vertical mounting surface. Accessories, such as lights, may be mounted on the mounting surfaces. A shaped clamp is placed through the existing brake light opening and when rotates the horizontal mounting surface tightly against the roof of the vehicle securely attaching the accessory mount to the vehicle without the need for making any additional holes in the vehicle.