Gwen Stefani is making a big return to The Voice in the show's upcoming season alongside boyfriend Blake Shelton, but Alicia Keys is reportedly not okay with Stefani being on the show.

According to Radar Online, the two female coaches are feuding behind the scenes, and it comes partially from the fact that Keys is allegedly upset that Stefani replaced Miley Cyrus on the panel.

"Alicia and Gwen have never really liked each other, and have been in competition for most of their lives," the source said. "But because Alicia and Miley got super close last season, Alicia is desperately trying to give Gwen a hard time so she does not return next season!"

The website also alleges that Shelton has "had words" with Keys about this, and Stefani has already logged complaints with the show's executives about her.

"Gwen knows that she has more pull than Alicia does, because she has a super solid relationship with all of the executives on the show," the source added.

However, Gossip Cop has refuted the story, speaking to sources from Keys' camp who immediately dismissed it as "not true."

In addition, there doesn't appear to be any bad blood between the two following a post Stefani shared of herself and Keys from their younger days on her Instagram page to wish her fellow coach a happy birthday on Jan. 25.

 Happy bday to my homie @aliciakeys #talentandheart Gx

A photo posted by Gwen Stefani (@gwenstefani) on Jan 25, 2017 at 10:31pm PST

"Happy bday to my homie," she captioned the photo.