Drake and Rihanna's Kiss Seen 'Round the World

Drake got in Rihanna's crotch and then puckered up onstage, essentially confirming what everyone's long suspected ... Drizzy and RiRi are a thing.

Rihanna joined Drake Wednesday night in Miami to perform their song "Work," when Drake buried his face in her crotch ... and eventually moved in for a goodbye kiss.

Check out the vid ... Rihanna doesn't curve him as hard as she did at the VMAs, where they've been inseparable ever since. She kisses back, even if it's just for a second.

They're in Bey and Jay territory ... #AubRih