Rihanna did not appear to be with Jameel as she was only seen with a bodyguard but was in good spirits as she was escorted to her waiting car.
This ring has not been seen on her before. It could be a piece of costume jewellery or fine jewellery she bought for herself, but given how happy she seems with the Saudi Arabian looker, it might just be a sign she is ready to wed.
Rihanna and Hassan were last seen together in Boston on Halloween; they were bowling at Lucky Strike Lanes.
"Rihanna was dressed as Kylo Ren from Star Wars and Hassan was dressed as a penguin. They were all super nice and friendly," a source told UsWeekly.
In September they enjoyed dinner in London. The two went to great lengths to not be seen together. She left by herself then waited in her car for 30 minutes before he popped out of the restaurant.
They were first spotted kissing in Spain earlier this year.
This summer The Sun reported the handsome businessman has already been married before.
Sources says he tied the knot with art expert Lina Lazaar at Paris Opera House in 2012. Both have now happily moved on.
Hassan is the deputy president and vice chairman of family business Abdul Latif Jameel – one of the biggest companies in the world. Rihanna is not the first of his famed romances as he was previously linked to Naomi Campbell.