It's interesting to hear a non_Warners owned movie song (Paramount,
"Sing you Buzzard--" "I mean Sinners":)), with Bing Criosby from
1938), used in a Warner short, but it's used in
"Doggone Cats" (October 25,1947/CineColor)
"Kit for Kat" (December? 1948)
"Fool Coverage" (December 1952)

Of all of the three that I can imagine here, it's more used in the
first "Doggone"..very catchy and it was done with songwiter (WB and
Paramount till "Moon River" and then at Disney for Robin Hood) Johnny
Mercer with famous composer Victor Young and a soon to be famous Spike
Jones backing (Spike's on drums..)

I also noticed some MGM Tom and Jerry's of the 1940s using Warner-
owned song..already established by Carl Sgtlaling and co.:rolleyes:
"Baby Puss" (with both "Baby Face" AND "You Must've been a beautiful
Baby".)