On the heels of its strong debut last week, NBC's The Voice welcomes Usher and Shakira to the family as two new celebrity musician coaches when it returns next spring for its fourth cycle.

Christina Aguilera, who is releasing a new album and going on tour, and CeeLo Green, who is developing new music plus a scripted comedy series for NBC based on his life, will take the next cycle off, it was announced today by Robert Greenblatt, Chairman, NBC Entertainment.

Current celebrity musician coaches Adam Levine and Blake Shelton will remain through season four.

"We are thrilled to welcome Usher and Shakira to 'The Voice.' The addition of these popular iconic artists continues the tradition established by Christina, CeeLo, Adam and Blake," said Greenblatt. "Doing two back-to-back cycles of this show requires a tremendous amount of time, and we are happy to accommodate the commitments made by Christina and CeeLo. The participants on our show benefit from our coaches' expertise and their continued success in the music business allows for significant new contributions to the contestants when they return."

The Voice returns with the strongest vocalists from across the country invited to compete in the hit vocal competition show's third season. Celebrity musician coaches Christina Aguilera, CeeLo Green, Adam Levine and Blake Shelton return along with Carson Daly as host and Christina Milian as Social Media Correspondent.

The Voice is a presentation of Mark Burnett's One Three Inc., Talpa Media USA Inc. and Warner Horizon Television. The series is created by John de Mol, who executive-produces along with Burnett, Audrey Morrissey, Stijn Bakkers and Lee Metzger.