[1] Sandler began performing as a boy with the Belgian choir « les petits chanteurs des sept croix » of Mouscron.

He attracted international audiences in Austria, Germany, Switzerland and Britain, and became a stage and television star with dozens of hit records.

Sandler then starred and headlined with singing engagements at the 'Roof Garden' of the renowned Café Roma in Alassio on the Italian Riviera leading him to his U.S. debut.

On 29 November 1963 Sandler joined the cast of the "Casino de Paris" revue at the Dunes Hotel in Las Vegas.

[3] The hit duo Sandler and Young performed for two decades as headliners in the main showrooms of the major Las Vegas hotels and casinos and all over the country.