While both pop stars have released Viva Glam lipsticks with Mac Cosmetics, the rapper's Nicki shade is the top pick. "#1 selling Viva Glam lipstick of all time. . . thank u for supporting a good cause. mmmuuuaaahhh! ! ! !" the American Idol judge tweeted along with a picture of her holding a jumbo-sized version of the lipstick tube.