Is Christina Aguilera difficult to work with? According to a new report, yes!

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Although the ninth season judge lineup for The Voice has yet to be revealed, a source recently came forward, claiming Aguilera may not be asked back because of her bad behavior on set.

“No one wants Christina to come back as a judge on season nine of The Voice,” a network insider revealed to Radar Online.

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Aguilera was part of The Voice for the series' first three seasons, but ahead of season four, she moved on. One season later, Aguilera returned, but only for the show's fifth season. Then, after taking off seasons six and seven, she returned once again for the recently-aired season eight.

“She was really difficult to work with this season. Tensions between her and Adam were consistent, but she also just had a really bad attitude," the source explained. "She showed up late a lot, took forever for hair and makeup and was just very demanding.”

As a result, former judge Gwen Stefani is reportedly in talks with the network in regard to a possible comeback.

“Everyone is really hoping that they bring either Gwen Stefani back, or Shakira,” the source said. “They were both a million times easier to work with than Christina ever was. She just thinks that she is the reason the show is still on and that it should revolve around her. Her act is getting old.”

Tags: The Voice nbc Reality TV Christina Aguilera