'The Voice' panel will look a bit different next season

On "The Voice," Carson Daly made a very special announcement.

CARSON: "This all just happened moments ago 'cause we're live, and we're very happy to officially announce that two music superstars will be joining the next season in these coaches chairs... Pharrell Williams and Gwen Stefani will be added to the voice family..."

Carson also announced that both artists will performing on next week's episode -- so we can get a little taste of what it'll be like to have them around next season.

Pharrell Williams and NBC both confirmed he was joining the show about a month ago, but we hadn't seen an official confirmation from Gwen Stefani...

Until tonight. The No Doubt frontwoman posted this picture on Instagram to coincide with the announcement on the show.

The big news comes more than a week after rumors started that the singer was in early talks to replace Christina Aguilera, who'll be sitting out next season because of her pregnancy.

It'sbelieved that Stefani was debating between "The Voice" and ABC's just-announced music competition "Rising Star," which premieres this summer.