ColourPop Sing is a warm plum with a sparkle finish that is limited edition and retails for $4.50. In comparison, Natasha Denona Stark (335M) is a warm burgundy with a pearl finish that is permanent in palette and retails for $29.00.
Natasha Denona Stark (335M) is 85% similar — it is less shimmery, lighter, warmer.
