Helen Kane was the real Betty Boop. Made lots of top songs and was in some cute movies. She never trademarked it, and some jews stole it and made cartoons using the name, voice and her image (cartoonize). When she sued and lost, she just retired into obscurity.
Her signature song was "I Wanna Be Loved by You" in 1928. This song gave here the Boop:
https://www.youtube.com/watch?v=hclK-UKJNgkI have her on 78rpm singing I Want To Be Bad. Cute one:
https://www.youtube.com/watch?v=AXPh5TvoTAc
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