Singer Gwen Stefani has parted ways with her manager of 16 years.

The No Doubt frontwoman had been signed to Jim Guerinot's Rebel Waltz Management firm since 1998, but she recently decided to end their professional relationship.

She has yet to officially hire a replacement, but has been aligning herself with media mogul Irving Azoff, who has been playing a big role in convincing Stefani to temporarily replace his pregnant client Christina Aguilera as a judge and mentor on the next season of U.S. reality show The Voice.

Stefani had reportedly been mulling a deal to join the panel of another new talent show, Rising Star, before Azoff suggested she take on The Voice. A deal has yet to be announced, but she is expected to join Pharrell Williams, Adam Levine and Blake Shelton when the new line-up for season seven is unveiled in the coming weeks.

The show is due to begin filming in June (14).