Selena Gomez and Justin Bieber have had a long and complicated relationship, but according to sources who recently spoke to Hollywood Life, the duo are “back on and very serious.”

The singers added more fuel to the relationship rumors when they enjoyed a late-night rendezvous in Miami on Tuesday, April 8. Selena was photographed paying a visit to Hit Factory studio where Justin has been hard at work recording a new song with 15-year-old Madison Beer.

As usual, Selena looked chic and sexy at she arrived at the studio, donning a short-sleeved crop top and thigh-high slit skirt. The “Come & Get It” singer could barely keep her eyes open as she made her way inside, reportedly having gone straight to the studio after a cross-country flight.

According to the same source for Hollywood Life, Selena’s family isn’t too happy that she’s back to spending her free time with Justin — especially considering the rumors that he recently gave her a promise ring. “Her family is extremely worried that she’ll do something crazy like elope with him,” the insider continues. “Selena is totally wrapped back up in Justin. It’s the same pattern happening all over again.”

Given that Justin seems to have such a close relationship with his own parents, you’d think he’d want to make sure her family approves. But this is Justin Bieber, and as we saw in that trainwreck of a deposition no one can tell him what to do.

“He loves her,” the source adds. “He can’t control how her family and friends feel about [them]. He’s not even going to try.”

Credit: NDN Photo: Selena Gomez and Madison Beer Visit Justin Bieber in Miami (VIDEO)