Selena Gomez vs. Demi Lovato Beef [RUMORS]: 'Neon Lights' Beauty 'Unfollows' Justin Bieber's Girlfriend on Twitter, 'Bye B*tch' Diss Prompts New Feud?

Rumors suggest that several of Selena Gomez's friends do NOT approve of her troubled on-and-off again relationship with fellow pop sensation, Justin Bieber. Did longtime gal pal Demi Lovato even express her disapproval, by "unfollowing" the "Come & Get It" beauty on Twitter!?

According to the infamous gossip webloid HollywoodLife.com, the "Neon Lights" songstress recently deleted Gomez from her Twitter feed (on Wednesday, July 2).

Just moments later, the 21-year-old former Disney sweetheart posted this rather cryptic meme:

Very interesting timing... hopefully Lovato's friendship with Gomez isn't faultering!

The two Hollywood starlets have been close friends for years - they even appeared on the hit show Barney & Friends together as little kids! Is Bieber's "bad" influence really ruining Gomez's outside relationships with family and friends?

Lovato's always had Gomez's back through thick-and-thin, but has the "Heart Attack" crooner finally had enough? Sound off in the comments below, Mstars fans!