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From the smile on her face to the fact that she never EVER has a fashion fail, Gwen Stefani can do no wrong!

Yesterday afternoon the No Doubt singer went to an acupuncture appointment in Los Angeles, and if she was this happy on the way in, we're sure she was even more elated on the way out!

Gwen's never spoken out about why she relies on the treatment, but she goes at least once a week (and she went during her last pregnancy), so clearly it's doing something for her. I mean, look at her -- she's 44 and she looks 29!