I posted about The Fall's Catinca Untaru when I first saw the film, but after listening to Filmspotting I have to say it's a most unpopular opinion.
That little girl was T-E-R-R-I-B-L-E. She's 'natural' to the extreme fault of the entire film. I saw this digitally projected at L.A. classy Landmark Theater, and I sometimes couldn't even understand what she was saying between her accent and her mumbly responses. It constantly looked like she was reaching for something to say. This isn't a performance, it's bad improv and Tarsem often let takes go on longer than necessary while Untaru could not think of anything else. I blame Tarsem for exploiting the amateurishness of the child in such a manner. And I blame Filmspotting for hailing this non-acting as brilliant.
...but that's just my unpopular opinion.