Gwen Stefani takes more care of her hair than her face. (Pic: AP)

Gwen Stefani takes more care of her hair than her face, because she is scared it will break and her locks will be ruined if she washes it a certain way.

The 48-year-old singer has admitted having blonde locks means she has to make a conscious effort to take care of her golden tresses, and she even had to tell her partner Blake Shelton to change the water in the system at his ranch in Oklahoma because it was damaging her locks. 

Speaking to Vogue.co.uk, she said: "I really do take care of my hair, even more than my face. Because you have to if you're a blonde. It's a funny story actually because Blake, my boyfriend, has a ranch in Oklahoma, and the water there is like, out of a well. I said: 'Ok I guess we're going to have to break up if you don't put soft water into the system because I'm not going to have any hair anymore...' I mean, it's going to break. So we just got the soft water, and I was like, 'hallelujah!' But you really do have to take care of it."

The 'Rich Girl' hitmaker has revealed she had always been desperate to have platinum blonde tresses, and when she finally went ahead with the beauty overhaul she felt more comfortable. 

She explained: "When I first went blonde, that was my favourite beauty experiment from the time I was in No Doubt. I'd wanted to do it for so long. I mean I'd done like grocery store frosting kits and things like that, but to actually go platinum was what I'd dreamed. For me that time period was so emotional - it was right when my boyfriend dumped me, so everything changed. I wrote 'Tragic Kingdom', and even though we were a band already for nine years, everything went crazy when we released 'Just A Girl'. But when I went blonde I felt like: I'm me now."

Gwen is not only known for her signature light-coloured hair, but also her red lip, which she believes is a "confidence booster". 

Gwen - who has Kingston, 11, Zuma, nine, and Apollo, three, with her former partner Gavin Rossdale - said: "I've loved make-up since I can remember. I used to run home from school and my girlfriend's mum had so much make-up and that's what we would do, you know, we'd play make-up. 

"I've never not worn a tonne of make-up. It's an extension of your personality and mood and it's a confidence booster. I do my own make-up every time I go on stage. I think that the process - I wrote a song called 'Warpaint' about it - makes me feel like I'm ready.

"There's a lot of stuff I've learned over the years. One thing is, if you really can't have it getting messed up then you should probably keep it to a matte lipstick, you know what I'm saying? After having kids, for me, that's one of the main things. If I'm in church or whatever and my baby is all over me... next thing you know it's all over your face."