Is Selena Gomez worried that there's gonna be one less lonely girl if Justin Bieber hangs out with Miley Cyrus?

Selena is reportedly jealous that Justin is working with Miley and is worried that they'll start hooking up, according to Life & Style.

“Justin and Miley hooked up a few years ago,” reveals a source. “Then he started dating Selena. It created this whole jealously thing between them."

"Now Selena doesn’t want Justin anywhere near Miley — and they’ve been fighting about it!” the source continues. Uh-oh!

Miley and Justin were seen at a recording studio together on May 16, and Miley posted a weird pic of Justin holding her as a baby.

Meanwhile, a source last year told Hollywood Life that Selena is "repulsed" by Miley, which presumably stems from a feud that started back when they were both on the Disney Channel. Harsh words!

We imagine Selena might be especially concerned about Miley and Justin spending time together now that Miley has reportedly recently split from fiance Liam Hemsworth.

So will something happen between Miley and Justin? Or does Selena not have to worry about them loving each other like a love song?

Source: Life & Style via Hollywood Life