A lamp shade cover that fits snugly over a lamp shade or lamp shade liner to provide interchangeable lamp shade decor with a tailored look. In embodiments, a separating closure mechanism attaches sides of the lamp shade cover together to form a lamp shade form that fits snugly over the supporting lamp shade or lamp shade liner. In embodiments, the separating closure mechanism is a separating zipper sewn into either side of the lamp shade cover. Embodiments include an interchangeable lamp shade system that includes a lamp shade liner and one or more lamp shade covers that fit snugly over the lamp shade liner and are removable via the separating closure mechanism of the lamp shade cover.