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40 celebrities you probably forgot guest-starred on 'Hannah Montana'

INSIDER Logo By osingh@businessinsider.com (Olivia Singh) of INSIDER | Slide 2 of 41: He first appeared as Johnny Collins, a boy at school that Miley liked, on the series premiere. During season two, Johnny popped up again after bidding $19,000 at an auction to have dinner with Hannah.

"High School Musical" star Corbin Bleu was the show's first-ever guest star.

He first appeared as Johnny Collins, a boy at school that Miley liked, on the series premiere. During season two, Johnny popped up again after bidding $19,000 at an auction to have dinner with Hannah.

© Steve Granitz/WireImage; Michael Kovac/Getty Images for Acura; Dia Dipasupil/Getty Images

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