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The right shoe went online on Monday (01Mar11) in honor of the star's 17th birthday and has already attracted a high bid of $650. The other shoe will be auctioned at a later date.

Proceeds from Bieber's kicks, which are described as worn and scuffed, will be used to build a new broadcasting and communications studio at the school.

The footwear is sure to be a hot item - a lock of the star's hair sold for a staggering $40,668 and a space suit Bieber wore for a TV commercial fetched $5,800 at auction earlier this month (Mar11).