Disney Channel announces a fourth season of 'Hannah Montana', the show has generated two double-platinum soundtracks, a No. 1 boxoffice movie, DVDs, a junior novel series, apparel, accessories, video games and a Miley Cyrus concert tour, which spawned a 3-D film version that became the No. 1 concert film of all time.

And the 'High School Musical' franchise's fourth edition will be helmed by choreographer Jeffrey Hornaday.

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Miley Cyrus signs on for more 'Hannah'