Usher, Shakira to Replace Cee-Lo Green, Christina Aguilera on The Voice Season 4

Usher, Shakira to Replace Cee-Lo Green, Christina Aguilera on The Voice Season 4

Two very accomplished artists will be taking over Christina Aguilera and Cee-Lo Green's fancy red chairs on The Voice during its fourth season.

A source tells Us Weekly Shakira and Usher are set to replace Aguilera and Green, who have each coached teams on the show -- alongside fellow mentors Adam Levine and Blake Shelton -- for the past two seasons. (The show's third season has just gotten underway on NBC.)

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Earlier this month, Aguilera opened up to Ryan Seacrest on his KIIS-FM radio show about her stint on the hit singing competition, admitting she once viewed her job as a coach on The Voice "kind of like a side project."

"[I thought], 'It'll keep me close to my son [Max, 4] in L.A. I don't have to travel," the five-time Grammy Award winner said. "Then it kind of took off, and there goes my free time!"

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The Voice source tells Us that Aguilera will use her break from the program to focus on tours and promotional duties surrounding the release of her new album, Lotus; Green is currently working with NBC on a new show of his own.

Both Shelton and Levine are set to return for Season 4.

This article originally appeared on Usmagazine.com: Usher, Shakira to Replace Cee-Lo Green, Christina Aguilera on The Voice Season 4