The former couple, who dated on and off from 2011 to 2014, were spotted hanging out at her house in Studio City, California, on Sunday.
In photos obtained by TMZ, Bieber is photographed pulling up to Gomez's house in his white Mercedes G-Wagon, 10 minutes before Gomez, wearing a gray sweatsuit and white sneakers, walked in.
According to the outlet, the two, as well as other mutual friends, hung out until at least midnight.
Gomez's boyfriend, The Weeknd, meanwhile, has been on tour.
from entertainment tonight