She was covered head-to-toe in a hooded black jumpsuit, as seen in a series of snaps from her visit which she shared on her Instagram account.
Rihanna is currently on her Diamonds world tour, having just arrived in the United Arab Emirates after playing shows in South Africa.
Hopefully concertgoers will be happier than her fans in Johannesburg, who were reportedly outraged at her performance on Sunday night.
Johannesburg's main newspaper The Star ran Ri-Ri Rip-Off on its front page on Monday, calling her performance 'below-par'.
TUMECHOTA NA KUMIMINA KUTOKA DM''