The amazing life of Britain's 'oldest' teen Hayley Okines is just like any other teenager: she loves clothes, shopping, and boy bands, and hates getting up in the morning. But she has progeria, which means her body ages eight times faster than normal, giving her the body of a 126-year-old. Her positive attitude and infectious smile have charmed millions of people through her Extraordinary People TV documentaries. Now in Young at Heart, Hayley continues...