If we're to take Heidi Klum's word for it, in the fashion industry, you're either in or you're out.  But the notion of being "in" based on one's age is increasingly being questioned - and for good reason.  From nine-year-old DJ Fulano to 91-year-old socialite Iris Apfel, we've rounded up some of our favorite age-defying DJs, models, and style entrepreneurs!

[Photo: DJ Mamy Rock via]

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