Addy Moore learned the 'Cha-Cha Slide' by DJ Casper at daycare Alex Moore One evening, Alex Moore was playing with her 23-month-old daughter, Addy They were being silly and listening to nursery rhymes ...

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CHICAGO (CBS) – Fans of DJ Casper, the man behind the infectious "Cha-Cha Slide," were celebrating what he meant to his native Chicago, after the songwriter died on Monday. Casper, born William Perry ...