Trepak refers to one of the most distinguished and celebrated dances in Pyotr Ilyich Tchaikovsky's
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Mark Alexander "Corky" Ballas, Sr. is a retired competitive ballroom dancer who holds several Latin dance championship titles.
He has one son, Mark Ballas, with former wife and partner Shirley Ballas. Corky and Shirley Ballas also raised and trained Julianne and Derek Hough.