All of you are just blindly typing her. I want to see your reasons. Real reasons.
Gwen Stefani is an ENFJ.
She is rather expressive and open with her emotions on nearly every interview. In an interview about the song "Don't Speak", she said that she felt like crying just thinking about it. To cry that easily is something very Fe dom like. And she was very open about it and quick to react to it too. If an Fi user felt like crying they probably would be more quiet and not really talk much about it. Not many Fi users like crying in front of people.
The way she describes things is more geared toward Ni-Se rather than Ne. An Ne user will always be making connections about two things and are very idea oriented. They usually bounce from one idea to the next. For her, she kinda has the general picture in her head and is more "playful" the way she describes things. She described No Doubt as a more "songy-song" band. I think she has some idea of how they sound internally, but expresses it in a more picturesque way. This is quite Se. There are many other examples of this.
A lot of how she gets into detail about fashion and her whole style is very Se-like. She is very focused on style and a lot of it is just imagery. It's not personal internal meaning like Fi. Obviously it plays a role in her personality as she has said, but that's more because she is probably a 4w3. She wants to stand out. That's really more of a 4 thing. Otherwise, she simply has an image.
Most importantly, songs like "Don't Speak" scream ENFJ. I mean listen to "Don't speak. I know just what you're saying. So please stop explaining". If I had a penny for every time I met ENFJ who will try to predict what people do/or say I'll be one rich fella. That's how they get so good at manipulating. They have the ability to predict patterns through Ni and Fe genuinely expects people to have a certain emotional reaction. It seems like this verse is exploding with Fe. She knows the minute that she hears him talk about the relationship she'll get upset. It'll strike a nerve for her. And this is quite Fe. Getting in tune with the current mood of what's going on.
No Doubt that she's an ENFJ, so don't speak. I know just what you're saying. And it's probably wrong.