11th Anniversary of Another Old Movie Blog - and a trivia question

This weekend marks 11 years for Another Old Movie Blog.  It has been a fascinating journey for me, and I thank you most sincerely for the pleasure of your company.

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Recently a request came to me to ferret out the name of a movie with this clue.  See if you can help!

"The story was something like--- a group of college students were entering a parade float (some kind of contest maybe - maybe the parade of Roses in Pasadena). They all worked really hard, at the last minute the engine broke down- so they all got inside and under the float and pushed it while singing the Battle Hymn of the Republic."

I don't think it's:

Pigskin Parade 1936
College Rhythm 1934
Best Foot Forward 1943
Mr. Belvedere Goes to College 1949
Blondie Goes to College 1942
Love Laughs at Andy Hardy 1946
Mother is a Freshman 1949
She's Working Her Way Through College 1952
Horse Feathers 1932.

But if you have any idea of what this film could be, please let us know.

UPDATE:
Hold your calls, please, I think we may have a winner. Caftan Woman, you are, indeed, swell.

Your suggestion of Peggy (1950) starring Diana Lynn could be the one.  She plays a girl whose family has just moved to Pasadena, and the neighbor boy turns out to be Rock Hudson.  AND, Charles Coburn, Charlotte Greenwood, Connie Gilchrist, Jerome Cowan, and Ellen Corby are in it, so I don't know how this one fell off my radar.  I'm going to keep my eye out for it.  What I think may be the smoking gun, as it were...a lobby card with a picture of a parade float on it.

Leave it to Paddy at the Caftan Woman blog to save the day again.

ANOTHER UPDATE:

Hold the phone, classic film afficionados - the person requesting this info thinks this is not the movie:

"I checked out the write-ups of the movie Peggy- it's as close as I have come thus far but I am pretty sure that it is not the movie that I am seeking.The story line in the movie I am speaking of all leads up to the final moments when the students that built the float (some kind of competition) discover that the float's engine has broken-down and after moments of disappointment and angst, at the last minute they team together, triumphantly, to push the float themselves. It was the plot, not a sub-plot behind a love story which is what the parade in the movie Peggy is."

Well, that lets the air out of my parade float.  Keep your suggestions coming.