Christina Vs. Gwen! Inside Aguilera & Stefani's 'The Voice' Feud

Gwen Stefani and Blake Shelton's romance is going to hit a major road bump soon when their time together on the set of The Voice comes to end, because RadarOnline.com has exclusively learned that Christina Aguilera is determined to come back next season no matter what!

Despite the season ending on a ratings high thanks to the hot relationship between Stefani, 46, and Shelton, 39, insiders told RadarOnline.com that Aguilera demanded a return, and the producers were unable to keep the new romance going on the air.

"Christina said that it was her show and gave a really big spiel about how she thinks that Gwen used this Blake thing to try and stay on the show," a production source told RadarOnline.com. "Now people are dreading her return."

Stefani and Shelton's sizzling on screen chemistry is going to disappear when the No Doubt leader departs, and RadarOnline.com has learned that producers are not expecting Miranda Lambert's ex to handle things well.

Shelton joked in an interview about the show having five judges, but the source told RadarOnline.com that he isn't going to get his wish.

"They have been switching the female judges on and off for over three seasons now and it has nothing to do with how well Gwen is performing" or what Aguilera wants, the source explained. "It has more to do with just keeping it different by changing it up. As of right now, there are no plans to make it five judges."