Rihanna has been named in a bizarre new lawsuit filed by a woman who alleged the singer's lipstick gave her oral herpes.

New Yorker Starkeema Greenidge claims she caught the virus from a sample of Mac's RiRi Woo lipstick, which was given to her at the singer's concert in Brooklyn, New York on 7 May (13).

Greenidge's lawyers claim the sales assistant "didn't use a fresh or new lipstick tube, but rather one that had been used for other patrons" and two days after the show, Greenidge found a coldsore on her lips.

The waitress says, "This is going to happen over and over again if nothing is done. I wasn't able to work for two weeks. It cost me a lot of money."