The singer happily picked up the table for her new beau's party to mark his upcoming 27th birthday on February 16.
The surprise party - which was held at Dave & Buster's in Hollywood - was attended by the Canadian artist's pals including French Montana, Big Sean and 2 Chainz.
The group had exclusive access to the venue from 11pm until the early hours of the morning but Selena was unable to make the event as she was in NY for New York Fashion Week, TMZ reports.
Whilst 24-year-old Selena was unable to attend the party, she and The Weeknd - real name Abel Tesfaye - spent some time together on a romantic yacht trip over the weekend.
A source said: "Selena looked happy and in a romantic mood. The Weeknd looked happy and very amorous. They were very intimate and looked very much in love."