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.
Of course, this news is even more exciting for the MAC AIDS Fund, as 100 percent of the profits from Viva Glam to —a collection that has collaborated with Gaga, Cyndi Lauper and Ricky Martin—go to help people living with or affected by HIV/AIDS.