This article is from the Disney's Haunted Mansion FAQ, by Don Bertino bertino@netcom.com with numerous contributions by others.
No.
It is NOT Leslie Nielsen or Walt Disney. These images were created in
or before 1969, Nielson was much younger then.
"Grim Grinning Ghosts" is sung by the Mell-O Men, a barbershop-type
Quartet (Max Smith, Bill Cole Stevens, Bill Lee and Thurl Ravenscroft).
The 5 Singing Busts were rumored to be the Mell-O Men also, but are not.
We are not sure who they are... Except for the broken head is
Thurl Ravenscroft, also known as the voice of Tony the Tiger. We will
try to straighten it who is who in future versions.
 
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