4. Bindi Irwin, 17

koala, mammal, vertebrate, nose, marsupial,

Do you remember everyoneโ€™s favorite Crocodile Hunter, Steve Irwin? Well, at age 17, his daughter is following in his famous footsteps. While Bindi isnโ€™t hunting any crocodiles, she is advocating for conservation efforts and last year she shined on Australiaโ€™s Dancing With the Stars.

Olivia Hallisley, 18
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