singing telegram

singing telegram (plural singing telegrams)

English Wikipedia has an article on:

singing telegram

Wikipedia

1. A message sent like a telegram, but delivered to the recipient by a performer who sings the message.
2. The performer who sings such a message.
   • 1995, Sandra Gurvis, The Off-the-Beaten-Path Job Book:

     As a singing telegram, you may not know what's really going on until you get to your destination and the recipient slams the door in your face or bursts into tears.