Thanks to newly released New Moon pictures, including this pic from the Bella's birthday scene, I'm also able to give you the details on exactly what kind of shoes Bella is wearing to her birthday party; they're called Vans Gisele in Black Turtledove Linen (that is one long name for a shoe, if you ask me):
With its cute, casual style, the Vans Gisele is easy on the eyes and on the sole. This mary-jane inspired style offers extra appeal with a ribbed toe bumper and double-stitched topline. An unobtrusive instep strap, fastened with Velcro, completes this comfort-loving look.Anyway, I am fairly sure about this one, that these shoes are actually the exact pair Bella is wearing in New Moon. And I guess I'm not the only one who's figured this one out, because the shoes are currently sold out in every internet shop I've seen so far. Here they are:

But if fashion's your thing, MMAV has all the latest New Moon trends!