Gwen Stefani says her eldest son, Kingston, is her muse.

The 45-year-old star, who has two other children, Zuma, six, and 16-month-old Apollo, with husband Gavin Rossdale, looks to their nine year old for inspiration when it comes to fashion.

Asked whose style inspires her own wardrobe, she said: ''That's a good question! Maybe [my oldest son] Kingston. He's got really good style -- and he's got good instincts.''

The blonde beauty is well known for her edgy ensembles, but insists she is very conservative when it comes to her hair and make-up.

She told PEOPLE.com at a BeautyCon event for her Harajuku Lovers fragrances: ''I've thought about going brunette. But then I'll feel sad! I'll add in a little black to change it up, but I just love being blonde.

''I have so many red lipstick shades. I really do probably have five that I kind of go in and out of. I mix them a lot. It just depends on what I'm wearing. It's weird because I kind of do the same thing every day, but ... it's always different as well.''

Aside from her own perfume collection, Gwen loves the smell of coconuts.

The 'Baby Don't Lie' hitmaker explained: ''I think it probably has to do with going to Huntington Beach and smelling that beach suntan oil that people don't wear anymore.''