* Ethel Merman's career: While Ethel Merman was a renowned Broadway star, she primarily focused on stage performances and films. She was not known for frequent appearances on television shows.
* The Monte Carlo Television Show: This show was a variety program broadcast from Monte Carlo. It featured a mix of music, comedy, and guest stars. While Patrick Wayne was a popular figure, the show did not attract many big-name guests.
Therefore, it's unlikely that Ethel Merman ever appeared on this show.