A Rihanna fan claims she got herpes from sampling the singer’s Riri Woo lipstick at a Barclays Center concert last month, according to a new lawsuit.

Starkeema Greenridge, 27, of Harlem, says she tried a sample of the Estée Lauder M.A.C. cosmetic at the May 7 gig, and now believes it was used by other patrons.

“I asked [the M.A.C. employee] if it was clean, and he said, ‘Yeah, yeah, yeah,’” Greenridge said. “Two days later, my upper lip was swollen with blisters.”

Greenridge, a bartender and social-media director, used to be a big Rihanna fan, her attorney, David Jaroslawicz, said.

“Now, I guess she’ll listen to Chris Brown,” he joked.

Reps for M.A.C. and Estée Lauder did not immediately return messages for comment.