Elvia Allman provided the voice of ‘Woman with large feet’. The short is also available in a colorized version.
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Screencaps from the colorized version
Other caricatured celebrities are:
1. Men on seesaw: Stan Laurel and Oliver Hardy
2. Little Tramp: Charles Chaplin
3. Man with big nose: W.C. Fields
4. Old lady: Edna May Oliver
5. Floating Power: Charles Laughton
6. Borax Karoff: Boris Karloff
7. Knee Action Special: Stepin Fetchit
8. Cheerio Special: George Arliss, Leslie Howard, Freddie Bartholomew
9. Caliban and Ariel: John Barrymore and Elaine Barrie
10. Hitchhiker: Clark Gable
Source: IMDB and Wikipedia