Selena Gomez, Justin Bieber Back Together? Watch Bieber Singing ‘My Girl’ To Ex-Girlfriend In Hotel Bar [VIDEO]

Justin Bieber and his on-again, off-again girlfriend Selena Gomez were spotted together again, giving rise to speculation that the two are dating again. On Friday, the two spent time together at the Montage Beverly Hills, when Bieber sang “My Girl” to Gomez.

Gomez and Bieber’s romantic evening was all caught in camera, and the two started trending on Twitter early Saturday, with several fans reacting to their rumored relationship.

“When you’re having a drink at an empty hotel bar and Justin Beiber appears out of nowhere and begins to sing on the piano," a fan wrote on her Instagram. She later added: “@justinbieber singing my girl to @selenagomez….is this real? Pure magic."

The 21-year-old “What Do You Mean” singer and the 23-year-old actress sparked dating rumors after reports surfaced that the two are making plans to celebrate the holiday season together. However, Hollywood Life reported that their plans for Thanksgiving and Christmas didn’t work out.

“Selena and Justin will not see each other for Thanksgiving or Christmas,” a source told Hollywood Life. “They actually were attempting to do something but it just isn’t going to work out.”

Here are some reactions from fans on Twitter over Bieber and Gomez's alleged reconciliation as "Justin and Selena" started trending.