Could this fairytale celebrity relationship already be over? That's what both fans and critics alike can't help but wonder as there's a new report that says lovebirds Gwen Stefani might be ready to quit Blake Shelton after a huge fight erupted on the set of The Voice.

Well, make that Team Blake.

According to Star Magazine on Tuesday, Stefani is none too pleased over the fact that she is constantly being demoted on the hit reality singing competition show, The Voice. She was first brought back on as a mentor for Team Blake after Christina Aguilera came back to the show this season and now there's the news that Aguilera's position will be given to Miley Cyrus next year.

Stefani is apparently livid behind-the-scenes as she isn't very happy that her position is being offered to the controversial 23-year-old singer. And now sources are saying that Stefani is ready to walk out if she doesn't get her way, which means fans will not only be missing her during the next season, but that her boyfriend will be seeing less of her, too.

One on-set tipster said, "Gwen is livid that she was not asked to replace Christina. And because of this she wants to quit the show altogether."

To make things worse, eyewitnesses are saying that after all the drama went down on set with NBC's producers, Stefani and Shelton realized that they might have been set up by Aguilera herself.

"[Gwen] and Blake seem to feel that Christina was responsible for this because she wanted to piss Gwen off," the insider revealed. "And it did!"

So far, no one has made any comments about the report.

Tags: Gwen Stefani Blake Shelton