A record label failed to pay Willie “DJ Casper” Perry Jr. royalties for his hit “The Cha Cha Slide,” the Chicago disc Radio DJey alleges in a lawsuit.Perry alleges in his lawsuit against M.O.B. Music Publishing, Inc. that the label sold more than 500,000 discs containing variations of the popular dance song he wrote‘Cha Cha Slide’ writer suing record label – UPI.com.