Ginny's Sweater/Vest in GoF Movie

[windsweptpetite.livejournal.com]

While I was watching GoF today, I noticed that in the scene where Ron is upset after asking Fleur to the ball Ginny is wearing what looks like a crocheted vest...or a knit cardigan with a crocheted front.  It looks to me like it might be granny squares or hexagons.  I was just wondering if anyone has been able to find a pattern for this...possibly as a vest.  Sorry the pictures aren't better.