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6 . Gwen Stefani – 46 years old
Obviously being a badass has done wonders for Gwen Stefani because she hardly looks like someone who was born in the… wait for it… 1960s! Say what?! Yep, Stefani is actually 46 years old which is truly hard to believe. Her face has barely aged and her body is rock hard. She looks better than rockers half her age. You go girl.
