
People used to slut shame an underage Britney for showing her midriff (even though she showed usually a small portion of it)
I remember Amazon.com reviews written for Britney's debut album in the late 1990's would slut shame her for showing some of her midriff as well as other things (the Rolling Stone magazine issue and believing she had breast implants).
Britney did wear a few revealing outfits in the late 1990's, but even some outfits she wore in the late 90's that showed her midriff were not that skin revealing.
Some of the reviews posted in the late 90's for Britney's 1st album were unhinged: one goofball said she didn't recommend her album unless for those who aspire to work on street corners and said that about Britney's debut album before Britney's 2000 MTV VMA's striptease and before Britney really began raunching up in the early 2000's. Britney's debut album didn't even have a Parental Advisor sticker on it even back when it was released!