Bella Hadid & The Weeknd: We Float Each Other's Boat (PHOTO)

Bella Hadid and The Weeknd shook off break-up rumors by partying on a yacht Monday in Miami with pal Karrueche Tran.

As TMZ first reported, Bella and Weeknd are still going strong ... especially since Weeknd is on break from his tour.

We're told they're spending New Year's Eve together and Bella will be front and center when Weeknd plays his January 2 show in Vegas.