Camila Meza is a jazzy singer/guitarist from Chile, and her latest album, "Traces," features a cover of "Little Person," from Synecdoche, New York. Here she is performing it live:

Update: Camila contacted BCK and provided a link to a better quality video. Thanks, Camila!

I came across it via Pop Matters' review of the album.

The other spectacular cover here is Meza’s closing version of “Little Person”, which is a tune from the intriguing Charlie Kaufman movie Synechdote, NY, written by Jon Brion. The original was a subtle stride piano feeling, and Meza keeps things simple here, accompanying herself on guitar only, offering up something as tender and heartfelt as jazz has to offer these days. (Source)