Meshuggah-Nuns!.

The 'Nunsense' sisters go on an all-expense paid trip on the “Faiths of All Nations” Cruise. When the cast of “Fiddler on the Roof” (with the exception of the guy playing Tevye) gets seasick, the ship’s captain asks the sisters and Tevye to put on a show. The result- Meshuggah-Nuns!