The song is part of a large wave of media trying to be body positive, notably the company Dove. However, “All About That Bass” perpetuates the ideology that in order for a woman to feel good about herself, she not only has to put down other women, but she has to be sexually appealing to a straight man.
While Trainor is embracing her love for her body, she does so on the basis that the she is attractive to a man, the line, “Yeah, my mama she told me don’t worry about your size, she says ‘boys like a little more booty to hold at night,’” best illustrates this, as well as the way she sexualizes herself. She is presenting herself as a sexual object, providing no other way in which her body is of value.
Although she says “Every inch of you is perfect from the bottom to the top” she also makes disparaging remarks about skinny women, singing “I’m bringing booty back, go ‘head tell them skinny bitches that.” Not only is this shaming women who are naturally skinny, but it puts women in a terrible position where not only are they facing criticism no matter how they look, but now they’re receiving criticism from a fellow woman who is trying to be body positive.
Not only this, she also jokes about how skinny women believe they have to lose weight, writing, “No I’m just playing, I know you think you’re fat.” This completely undermines the struggle of women who have eating disorders and body dysmorphia, joking about the fact that they believe they aren't good enough, and have to be something else. I find this the worst part of the song, as it trivializes a disorder that has the highest mortality rate of any mental illness.