[credit]David Livingston/Getty Images[/credit]

Jelena’s roller coaster romance has hit another bump. Our fave celeb couple seemed to be on the mend from their recent split, but now there are rumors that Selena is upset about Justin spending time with another person. Who’s this third wheel? Her ex, Nick Jonas!

Justin and Nick hung out in the studio while Justin’s working on his acoustic album, and sources say that Selena is super upset about it.

“Justin and Nick Jonas hung out all last night [Dec. 13],” the source said. “Selena was crying about it. He (Justin) wouldn’t even return her calls when she found out and called him up.”

Even though Sel and Nick hadn’t been as serious as her and Justin, apparently she was still totally heartbroken after they called it quits.

According to Twitter, the boys totally did some bro-bonding:

What do YOU think? Was hanging out with Nick a huge no-no for Justin? Tell us in the comments and on Twitter!

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