ColourPop Boogie Down is a warm yellow with a metallic finish that is limited edition and retails for $4.50. In comparison, Natasha Denona Limoncello (169M) is a warm yellow with a metallic finish that is limited edition and retails for $29.00.
Natasha Denona Limoncello (169M) is 90% similar — it is more shimmery, darker.