The new and distinct cultivar of perennial Sedum plant named ‘;Popstar’; is characterized by tight-forming compact clumps with small-sized, blue-green glaucous foliage blushed with greyed-purple on vertical to slightly arching branching stems flower stems that resist falling over and opening up in the center of the plant throughout the growing season. Numerous stems produce a multitude of flowers of mauve-pink effect completely covering the top of the plant. The new plant is useful for the landscape in containers, as specimens, en masse.