It looks as though Christina Aguilera might feel a little intimidated by one of the new coaches on this season's The Voice. Rumor has it that Aguilera, who is currently on maternity leave, is scared that newcomer Gwen Stefani might permanently take her place on the show.

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According to OK! Magazine on Friday, Aguilera is having a hard time relaxing at home with her newborn daughter Summer Rain because she's fearful that she may no longer have a job on the show once her maternity leave is up.

A source close to the chart topper says, "Christina is extremely threatened by Gwen Stefani. She knows that if the ratings are higher on Gwen's season than they were on hers, the producers may have no choice but to ask Gwen to stay on."

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What's more, Aguliera is also worried that yet another singer might replace her on the show, too.

The insider added, "Christina's in a world of paranoia right now. She's also worried about Taylor Swift coming on as an advisor. She's ready to fight for her spot."

Meanwhile, it looks like Stefani is getting a little coaching herself.

The blonde beauty has been seeking advice from other panelists, including Adam Levine and Usher. Both Stefani and Pharrell Williams will be replacing season 6 judges Shakira and Usher. Veterans judges Levine and Blake Shelton are set to come back with Stefani and Williams, in the highly anticipated season.

According to Levine, the Maroon 5 frontman is looking forward to working with his new team. "I've been a fan of Gwen's and Pharrell's for so long - they're both such inspirational people. They're incredible, and it's such a score to be able to get them on this show," he said.