They managed their romance a secret for almost for six months before they were snapped enjoying a steamy kissing session in Spain over the summer.Friends of the singer believe it is the “real deal” after she spent a number of secret weekends in the UK with him this year.Since then, the exes surprised and confused the world when they collaborated in 2012 (“Nobody’s Business” and the remix of “Birthday Cake”) but they never pursued an intimate relationship again.

Hassan dressed down in jeans and trainers, and he covered his face with a baseball cap.

Rihanna has been in London this month for Fashion Week and to launch her new Fenty Beauty make-up range.

Her fans have grown with her, inspired her and learned from her, as she took over the music industry.

From on-and-off again boyfriends, to never-again boyfriends, we will be going down the list of the guys that stood out the most of Rihanna’s boyfriends.

Rihanna earned significant recognition following the release of her first two studio albums Music of the Sun (2005) and A Girl like Me (2006), both of which were influenced by Caribbean music and peaked within the top ten of the US Billboard 200 chart.

Rihanna's third studio album, Good Girl Gone Bad (2007), incorporated more elements of dance-pop and catapulted her to greater stardom, establishing her status as a sex symbol and a leading figure in the music industry.

The pop superstar, 29, and the Saudi billionaire Hassan, whose family has dealership rights to Toyota cars, have been linked since earlier this year, but they have been keeping their romance out of the spotlight.

The couple have not been seen together in weeks before they were snapped hitting the town in the early hours of Friday.

The insider added: “Lina has also moved on with a new partner.” The former couple bonded over their love of art.

Lina was named one of the Top 10 Most Influential Women in Middle Eastern Art last year and has earned her crust as a specialist at Sotheby’s since 2006.

A source said: “Hassan is an intensely private individual.