It looks like Christina Aguilera and Cee Lo Green will both be returning to The Voice US for its next 'season' (series).
According to The Wrap and "an NBC executive with knowledge of the situation", Aguilera's deal is already done with the 'Sing For Me' chanteuse getting somewhere between $12.5m and $17m (!) for returning.
Cee Lo Green's contact negotiations are ongoing apparently, but it's likely he'll replace Usher, which was always the plan anyway as far as we can remember.