The 20-year-old singer-actress flew to Oslo, Norway to be with the pop star, who performed a concert there recently, and sources believe they are back together following their affectionate display, reported People magazine.
"They were holding hands, hugging and they kissed on the lips. They looked really in love, like no fights ever happened before. It definitely looked like they were back together," a source said.
While Bieber, 19, and Gomez split back in November, they have kept in touch. Last month, the 'Baby' hitmaker was spotted visiting her Los Angeles home.