Earlier this month (Dec15), the couple was rumoured to have taken a break from their relationship, with an insider telling E! News, "Bella and The Weeknd have taken a break. Their schedules got very busy and it really cut into their relationship."
However, the stars appear to have put the gossip behind them by heading to a birthday bash in Miami together on Sunday night (27Dec15).
A source tells New York Post gossip column Page Six the pair partied at two clubs in the city to celebrate The Weeknd's manager's birthday.
"They were having a good time. They partied until 7 a.m.," adds the insider.
The Weeknd is in Miami ahead of a planned gig there on New Year's Eve (31Dec15).
The Can't Feel My Face singer, 25, began dating the 19-year-old daughter of former model Yolanda Foster in the spring (15), and they reportedly spent the holidays apart.
Bella previously credited her boyfriend with helping her through her battle with Lyme disease, which she has been struggling with since 2014.
She told Britain's ES Magazine The Weeknd has been very supportive and "really good about me being sick".
The catwalk star added of her condition, "It was a dark time (when I first got sick)... It affected my memory so I suddenly wouldn't remember how to drive to Santa Monica from Malibu where I lived. I couldn't ride. I was just too sick. And I had to sell my horse because I couldn't take care of it...
"I used to be the last to go home at a party, now I'm the first... This was my first full (catwalk) season. I was so exhausted... I only did 13 shows... The show girls do, like, 12 shows a day. I only did one or two shows a day and I was like: 'I need to go to sleep'."