Selena Gomez has joined The Weeknd on his South American tour

The couple have done plenty of globetrotting since confirming their relationship in January, having been spotted together in a host of glamorous locations, including Florence and Paris.

And their "chemistry" can apparently be traced back to the time they spent together in the recording studio.

A source previously said: "They really clicked musically when they were working on a song together.

"Their chemistry was off the charts and she's really into him."

And recently, The Weeknd rented out a whole cinema for a date with Selena.

The 'Can't Feel My Face' singer and Selena kept themselves to themselves by hiring out an entire movie theatre to watch 'Get Out'.

An assistant reportedly went to the theatre earlier in the day to book the experience, which would have cost them about $1,500 plus tax.

When it came to the evening, the duo arrived before the 9.45pm start and were ushered into the building in a service elevator.

An eyewitness said: "She was super cute with him ... arms around his neck."