Sevigny was robbed of an Oscar
Jolie had a flashy and over the top turn, but the role of Lana was harder because a lot of it was about what was unsaid.
Jolie's characters temperament in Girl, Interrupted was obvious: fiery, angry and flightly. It's easy to act and be impressive with your hands in the air. Of course the Academy loved that, because they rarely award subtle performances. But Chloe Sevigny communicated SO much emotion with so little: it was all in her face, her mannerisms, her movements and never her words, just tiny complicated nuances.
She also had to transcend the hardest barriers with her love for Brandon and overcome that small town ignorance... I think she went from curiosity, to love, to confusion/doubt and love again all within probably 70 minutes screen time. Let's just say it was no easy performance, but she nailed it and thoroughly deserved to win that year.
Call me crazy, but I might even say that she was better than Swank. That's saying a lot, because Swank was obviously brilliant. But Chloe's heartbreaking performance lives on in my memory, 16 years since I first saw the film in the cinema and I think it needs to be championed as much as Swank's.