MAC What's Going On is a cool fuchsia with a pearl finish that is limited edition and retails for $20.00. In comparison, MAC Viva Glam Taraji P. Henson is a cool fuchsia with a sparkle finish that is limited edition and retails for $21.00.
MAC Viva Glam Taraji P. Henson is 90% similar — it is darker, more muted.
