Move over Katy Perry, there’s another green haired beauty stealing your spotlight! Rihanna took to Twitter to reveal her second Viva Glam collection for MAC, sporting slime-colored locks and a matching top and skirt. MAC also revealed the new Rihanna hue for their lipstick collection – it might not be fit for the office, but it’s perfect for feeling like a good girl gone bad! Check out all the details on Rihanna’s latest collab – plus the awesome cause these cosmetics benefit!