There is an old black and white movie that I remember seeing, and I
haven't seen it since. I don't remember a lot about it other than the
characters were trying to figure something out. There was a teenage
girl who walked around singing this strange song. Part of the lyrics
were something like: on is flies is, in comb bees in. At the end of
the movie it turns out that the lyrics are the clues that lead to
solving the problem or case. I would love to find out what the name of
the movie is. Thank you!

Dear kipeep,

The movie is "Murder, He Says" (1945), starring Fred McMurray.
Actually, the lyrics that turn  out to be the key to the location of a
hidden treasure are: "On horse flies is, on comb bees is, on chest
knob is, in knob keys is".

Here is the International Movie Database entry for the film:
http://www.imdb.com/title/tt0037931/

Hope this answers your question!
Regards,
Scriptor


Sources:

K. Harper, "Re: Can anyone ID this movie?". Online posting
(1997/10/09), <rec.arts.movies.past-films> via Google Groups.
http://groups.google.de/groups?hl=de&lr=&newwindow=1&c2coff=1&selm=343CDE81.134D%40bgnet.bgsu.edu

bike2work, "Re: On Horse Flieses". Online posting (2000/01/13).
<rec.music.classical> via Google Groups.
http://groups.google.de/groups?hl=de&lr=&newwindow=1&c2coff=1&selm=00091c0e.f19c7459%40usw-ex0102-016.remarq.com

Earle Jones, "Re: More info on a movie I seek". Online posting
(1995/10/07). <rec.games.trivia> via Google Groups.
http://groups.google.de/groups?hl=de&lr=&newwindow=1&c2coff=1&selm=4571k1%246g0%40chum.hooked.net

IMDb user comments for Murder, He Says (1945)
http://www.imdb.com/title/tt0037931/usercomments

Search terms used:
"in comb bees"
http://groups.google.de/groups?q=%22in%20comb%20bees%22&hl=de&lr=&newwindow=1&c2coff=1&sa=N&tab=wg
://www.google.de/search?q=%22in%20comb%20bees%22&hl=de&lr=&newwindow=1&c2coff=1&sa=N&tab=gw