The song is also referenced in an episode of THE MUPPET SHOW

Dr. Bob (the dog) is operating on someone, assisted by Theatre Nurse Miss Piggy.

Dr. Bob is singing "Hutsut Rollsten"

Nurse Piggy (incredulously) "But Dr. Bob, you can't sing at a time like this!

Bob "I wasn't singing 'At a time like this', I was singing 'Hutsut Rollsten'"

Rimshot, & exagerrated bows from both characters.