Christina Aguilera, Gwen Stefani Feud On 'The Voice?' Blake Shelton's Girlfriend Back For Season 10?

Gwen Stefani and Christina Aguilera reportedly has a running feud as the former No Doubt singer will serve as co-mentor with boyfriend Blake Shelton on season 10 of "The Voice."

Apparently, Christina Aguilera thinks that Gwen Stefani is just using Blake Shelton to stay on "The Voice" season 10, according to multiple rumors.

Reporteldy, Blake Shelton "proposed" to Gwen Stefani to be his co-mentor and luckily, the "Used To Love You" singer said yes. Christina Aguilera is set to take back coach's chair from Gwen Stefani when the singing hit show returns on Feb. 29.

The crooner hinted as season 9 was drawing to a close in December that he'd like to keep his lady on the set.

"I don't want Gwen to not be on the show. Why can't we have a fifth coach?" he said, as reported in Us Weekly

As the couple will spend more time together, the feud between Gwen Stefani and Christina Aguilera reportedly started. The "Fighter" singer allegedly felt "stabbed" in the back as the country singer and the No Doubt singer are allegedly teaming up to get her fired.

According to Star magazine, as shared by Hollywood Life, "Blake's not being subtle about campaigning for Gwen to stay on at Christina's expense. It's made things very tense on set."

"Blake's gone on this power trip by trying to control the way the show runs and everyone's getting annoyed," the insider added.

Christina was said to be unsupportive of Blake Shelton and Gwen Stefani getting together. She basically brushed off the idea of their relationship: "Ha, good luck with that," she was quoted by the outlet as telling the country singer.

Meanwhile, Gossip Cop claimed that there's no truth to the rumored feud between Christina Aguilera and Gwen Stefani. The website claimed that the report about the couple ganging up to get her first is "not true."

"We're assured, as well, that Shelton 'adores' Aguilera, and the singer is 'like a sister to him,'" it added.