See Rihanna + Drake Holding Hands
It's not proof of anything other than affection, but these two have been the subject of reunion rumors for weeks. Where's there's smoke, there's fire.
It was also suggested that Rihanna was the cause of her ex Chris Brown's split with Karrueche Tran due to a visit RiRi paid Breezy in rehab. No Rihab, mind you.
RiRi and Drizzy have been hanging out a lot. Maybe they are just good friends. Or maybe it's something more.