I’m so in love with this geometric beading from Jonathan Saunders’ Spring 2011 collection. It has such an ethereal 1920s look to it. I think you could do something similar with applique or embroidery. But the soft colors and texture really make it.
(PS: Sorry if I’m wrong about this being beading. I seem to recall reading that somewhere, but can’t source it, so I’m not sure.)
ETA: According to the review at Vogue, it is beading.
ETA #2: G points out in the comments that it is more likely sequins, going by the similar close up shot on Vogue UK.