Not many people have lived enough of a life to write a memoir at age 16. Well, Miley apparently had, because she published "Miles to Go" in March 2009. The book – which included everything from her breakup with Nick Jonas to her struggles with mean girls to her heart condition, tachycardia -- reached No. 1 on the New York Times children's bestseller list. "There's a lot about being bullied and a lot about breakups, and that's something that is really hard to write about and stuff that's easy to relate to," she told MTV. "And I wanted my fans to always be able to relate to me, so I think that was really important."