RIHANNA has vented her anger after encountering “the most racist man ever” at her hotel in Lisbon while on tour.

She wrote on Twitter: “This man said the craziest s*** about black women, calling us dogs, sluts. We don’t look like s*** and we don’t belong in the same hotels.”

Rihanna performs the first of three gigs at London’s O2 Arena tomorrow – the final dates of her gruelling Loud tour.