Did Selena Gomez call Miley Cyrus a "trailer-trash?"

Reportedly, the ongoing feud between the two former Disney stars started way back when the "Come & Get It" songstress and her former beau Justin Bieber were having problems with their past relationship.

"Miley actually has never hooked up with Justin but she loves that Selena thinks she has," Sugarscape quoted an alleged Hollywood Life source. "Miley doesn't see Justin that way, they're just friends, they're like family, but she's happy that Selena is threatened - anything she can do to get to her."

Adding, "[Miley] hates everything about her. She thinks Selena is the biggest hypocrite of all time, she acts like she's so perfect - like she's this goody two shoes - when she's partied just as much as anyone, she just keeps it on the down low."

Gomez, on the other hand, allegedly forbade Bieber from seeing the "Wrecking Ball" hitmaker before, while she calls her name behind her back.

"Selena forbid Justin from hanging out with Miley and turned a lot of their mutual friends against her," the source revealed. "Selena would call Miley 'trailer-trash' behind her back. Miley got really sick of her being so two-faced."

And just recently the alleged seven-year feud has sparked anew following an altercation during their common friend, Cody Simpson's 18th birthday celebration.

"Miley and Selena got at it at Cody's birthday party," the alleged source of Hollywood Life revealed.

Adding, "Miley said something about Cody having to have two different birthday parties in order to cater to Selena who didn't want to have any run-ins with Justin [Bieber]."

 Cyrus and Gomez since then have reportedly engaged in an all out Instagram war.

Meanwhile, the pop stars' rumored former love Nick Jonas is reportedly asking the two to stop with their petty quarrel and just move on.

"Nick's teeny bopper days feel like ancient history to him. He doesn't spend one second of his life thinking about Miley or Selena as he's too focused on his future. Nick wants to be taken seriously as a leading man in Hollywood so to have his name dragged back into some junior high school feud is really frustrating," an alleged insider of Hollywood Life claimed.

Adding, "Nick's completely moved on and thinks Miley and Selena should too. They should get over any problems they had with each other when they were kids. It's time for everyone to grow up."