Shakira and Usher are set to return to 'The Voice' USA next year.

The 'Gypsy' hitmaker - who recently announced she was leaving the talent show to focus on her family - and the 'Scream' singer are in negotiations with NBC to sign a deal for the sixth series in spring 2014, Entertainment Weekly reports.

Original judges Christina Aguilera and Cee Lo Green have been confirmed to be taking their places on the panel for the next season later this year as part of a alternating judges routine, with Maroon 5 frontman Adam Levine and Blake Shelton remaining in place for both upcoming competitions.

A source said: ''It is almost all done and the network is looking to make the official announcements in the next few days.''

Executive producer Mark Burnett previously expressed his interest in seeing the judging panel vary over each season.

Shakira - who has four-month-old son Milan with soccer star boyfriend Gerard Pique - revealed her decision to temporarily depart from the show yesterday (16.05.13), adding she wants to continue her own music career.

She said: ''I'm not going to be able to do next season because I have to get back to my motherhood and also get back to the studio, the recording studio, to finish my album, the one that I started working on before I had to deliver a baby and before I took this gig with 'The Voice'.

''So yeah, I have to take a little break. But you never know, I might come back!''

As for Usher, the singer is said to have signed onto an upcoming film project which clashes with the next series.

A source said: ''Usher is doing a movie, so he couldn't do season five if they wanted him to.''