Uh Oh! It may be trouble brewing up for Rihanna…Starkeema Greenidge, 28 of Harlem, NY, claims she received herpes after attending Rihanna’s Diamond World Tour o_O. On May 7, Greenidge attended Ri-Ri’s concert at Brooklyn’s Barclay Center and while there she browsed the MAC pop-up shop which promoted Rihanna’s new RiRi Woo lipstick. According to the lawsuit document that was filed, while Greenidge shopped, a MAC employee instructed her to apply the display RiRi Woo lipstick on her lips. Greenidge claims that the MAC employee did NOT use a fresh or new lipstick tube, but rather one that had been used for other patrons !!! YIKES….See more after the jump