The couple, who split in 2009 following Brown's vicious assault on Rihanna prior to the Grammy Awards, were seen embracing after Rihanna scooped the award for Video of The Year for 'We Found Love'.
Departing the stage, she was met by Brown who rose from his seat and planted a kiss on Rihanna's lips. He then left his arm around her waist as she left to return to her seat.
Rihanna cofessed she still loves Brown during her much-hyped interview with Oprah Winfrey, which was broadcast on US television on the weekend.
"I’m single but we have maintained a very close friendship since the restraining order has been dropped. It’s not easy," said Rihanna during the interview. "We went to a mutual friend’s party on a yacht. It’s awkward because I still love him."
"I truly love him and the main thing for me is that he is at peace. I’m not at peace if he is unhappy or he is still lonely. I care. It actually matters that he finds that peace."
Both Rihana and Brown won VMAs at the Los Angeles ceremony last night. You can see a full list of winners here.