Frank Sinatra Christmas

In the organizer's words:

How do you say Merry Christmas in Hawaiian, and how do you celebrate in Killarney, Ireland?
The quartet "let's be frank !", which has dedicated itself to the style of the great and eternally young Frank Sinatra, promises a swinging X-Mas session with lots of singing and good humor.
It is already clear that other guest musicians will be on board, including Bing Crosby, Elvis Presley and Dean Martin, but stars from Kassel and the surrounding area could also appear...