I just want to say, she's actually likeable for a good reason. I know we hate everything popular/mainstream/etc. here, but some of you will get what I mean.
She's the first actress from our generation (86ish to 2001 I guess) who is not only popular, but also real. Maybe she's still playing the politics of hollywood, but if she is it's seamless. You get people like Anne Hathaway (who I like, don't get me wrong) who come off kind of like they're pandering to the whole ~leading lady~ thing, with the awkward stiff white person issues. Ellen Page and Emma Stone come close, but they're somewhat more composed and reserved. Lawrence is just kind of...there, and while she is confident and self-effacing (as you'd expect her to be), it comes off genuine. She almost seems like how we feel we would behave in her position. It's that genuineness that I think is really appealing. It's one of my favorite kinds of humor and it's what Smiral has going for her too.
Like she makes noises, gets all confused by questions without trying to play it off or be like "oh I'll just smile and get out of it and the audience will love me" kind of stuff. She really has that attitude a lot of our generation has, where we say w/e comes to mind without realizing (or caring) about a filter. She still has one, obvs, but it looks like nothing compared to other stars.
Here are a few more if you're bored: