Young Miley Cyrus became an overnight sensation in 2006 as the star of the Disney Channel television series Hannah Montana, but fortunately her family has had some experience with that sort of thing -- her father, Billy Ray Cyrus, went from obscurity to stardom in a few short months when the song "Achy Breaky Heart" hit the charts in 1992. The success of "Achy Breaky Heart" was hardly the only memorable event for Billy Ray that year -- on November 23, 1992, he and his wife welcomed their daughter Destiny Hope Cyrus into the world. Destiny's cheerful disposition as a child earned her the nickname Smiley, which stuck when it was shortened to Miley. Miley's career as a professional actress began in 2003, when she appeared in an episode of the television series Doc, which starred her father; the same year, she landed a small role in the Tim Burton film Big Fish.

Miley developed an interest in music early on, writing songs and learning to sing while still a...