The pop star and royal came together at the National HIV/AIDS Commission's "Man Aware" event in Bridgetown, Barbados, to show how easy it was to get tested.
Kensington Palace tweeted a video of the pair getting tested, with the caption "Watch Prince Harry and @Rihanna test for HIV, to show how easy the process is #WorldsAIDSDay #RoyalVisitBarbados #ProTESTHIV."
The video shows them chatting together as they get their fingers pricked for the test. Their results came back negative.
They were both in Barbados for the island's 50th anniversary of independence, which was celebrated Wednesday with a concert.
— Kensington Palace (@KensingtonRoyal) December 1, 2016Advertisement
Entertainment Tonight said the Toast of the Nation celebration and subsequent concert were part of the prince's two-week tour of the Caribbean.