She's been around since the 90s, when she was the vocalist of popular band No Doubt - but what is Gwen Stefani's net worth after nearly three decades in show business and expanding to other ventures?

According to Jezebel.com, superstar Pharrell Williams produced the latest Stefani track, "Spark the Fire" - a song that's supposed to come with heavy feminist undertones. At a time when feminism is one of the most controversial words out there, it's unsure what a track with that kind of theme would do to Gwen Stefani's net worth.

At the beginning of the month, Pharrell previewed a bit of the new "Spark the Fire" song, saying simply that it was "about feminism," and now they've showed off a bit more of the track on The Ellen Show, according to Time Magazine.

While it's not the first time the two stars team up, it's still interesting to wonder what will this new song do to Gwen Stefani's net worth.

Back in 2005, Pharrell and Stefani collaborated on her hit song "Hollaback Girl," one of her most successful tracks to date. While it's no surprise that they'll join in forces after working alongside each other in The Voice, it's always a breath of fresh air to see two greats together!

According to Entertainment Tonight, the 45 year-old singer has been facing divorce rumors over the past few months, as it's been said that her relationship with Gavin Rossdale hasn't been in the best of shapes for a while. Earlier this year, back in February, the singer had her third child with her husband (with whom she's been married since 2002), a son like their two previous ones.

According to specialized website Celebrity Net Worth, Gwen Stefani's net worth stands currently at $100 million - after a long and successful career that has been going on since she first joined No Doubt in 1986!