I first saw Kay Baxter when she was 115 lbs. and featured in a 1980 Sports Illustrated stories about female bodybuilding, "Here She is, Miss, Well, What?": http://sportsillustrated.cnn.com/vault/article/magazine/MAG1123276/1/index.htm (no pics) She looked great but was like a typical top FBB at the time -- big legs and defined uppber body without much size there. I believe the only women with big upper bodies back then were Laura Combes and Carla Dunlap. But then a year or two later Kay Baxter appeared in a contest weighing 130 lbs, apparently all of the extra weight in her upper body, and she looked much bigger than those two or any of the other contestants.
It was the 1982 Ms. Olympia. Trained by Don Ross, Kay went all out for muscle, even dabbling for the first time in steroids. She later said she and Ross figured she was so big and ripped compared to the other competitors, she would finish either first or last. When she arrived at the Olympia, according to bodybuilding journalist Reg Bradford, Kay and others, jaws hit the floor even seeing her fully clothed. Bradford wrote in his contest account for BodyPower that people went around whispering to each other, "Have you seen Kay?" One competitor, Kay said, came up to her crying, "That's NOT what a female bodybuilder should look like!" She finished mid-pack, but left as one of the three most talked about competitors behind winner Rachel McLish and runner up Carla Dunlap.