Fuuuuuck, that's the first I've seen of LL's legs and that is definetly some Humpty-Dumpty-esque anatomy. I would think her legs would have at least a little more meat as a side-effect of having to lug all that corpulancy around, but there's probably not that much "lugging around" happening.
You know what I think about her whole need to post terrible/gross photos thing? It's the sort of thing that happens when someone gets a lot of crap when they're younger and end up with piles of insecurity and get this complex about tearing themselves down first before anyone else can. The logic is that if they acknowledge their flaws/insecurities/horrifying anatomy first people won't bully them about it. LL seems like she's pulling a "can't make fun of me for being fat because I just posted my saggy gunt and pendulous tits on social media so I'm obviously aware and most definitely not bothered by it, can't use that against me now, Stacy from 7th grade math class!" Except she is very bothered by it and in no way secure.
Another thing is her constant need to be so quirky and different, you guys! She's not like those OTHER girls, who do mainstream things like "go outside" and "fit in airplane seats". Her nightmarish boobs are just a part of her quirky, "nothing like those middle school mean-girls" persona. I think she might have wanted to be one of the thin, pretty, popular girls though, and she's still bitter as shit about it decades later. Girl's got serious baggage and I don't mean her ass.