Gwen Stefani, 41, has to make sacrifices to look good and says she ''beats herself up'' if she doesn't always look her best.
Gwen Stefani says looking good is "a daily struggle".
The 41-year-old singer admits she sacrifices her favourite foods to stay in shape and and says she "beats herself up" if she isn't looking her best.
She said: "It's a daily struggle. I work out five days a week, I can't imagine not doing it.
"I'd like to have no rules and eat what I want, but I've learned over the years that I'm so disappointed when I can't wear the clothes I want to wear. And if I let myself down, appear on stage when I'm not looking my best, it's not fun for me. I beat myself up about it."
The No Doubt star - who has sons Kingston, four, and two-year-old Zuma with husband Gavin Rossdale - also confessed her beauty routine is just as strict and she will never leave the house without her face and hair perfectly made up.
She said: "It really is a lot of maintenance to be a girl! Just when you think you're done getting your hair done you're off trying to pluck or do something else.
"But I'm the type of person - I like getting ready to go out more than I like going out. I wear make-up every single day."
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