She made the comment to talk show host Chelsea Handler in Sydney, when she was interviewed for the Chelsea Lately show.
Barbados-born Rihanna, 23, who is currently performing her Last Girl On Earth tour around Australia, said: “I look around at my concerts and there is like one or two.
“It is a rare thing and these people can be very black, too.
“They are very beautiful, very special.”
Comedienne Chelsea earlier quipped she had only seen “three-and-a-half black people” during her week-long stint Down Under.
Chelsea is in Sydney to record three episodes of her show and Rihanna was her guest in the final episode, recorded today.