MAC Viva Glam Miley Cyrus 2 is a warm coral with a sparkle finish that is limited edition and retails for $21.00. In comparison, Becca Watermelon/Opal is a warm coral with a pearl finish that is permanent and retails for $24.00.
Becca Watermelon/Opal is 90% similar — it is less shimmery, lighter.
