bought these at steve maddens ross for under $17, actually i have a similar wedge pair that i bought for $70 (just the straps and color are different)
glitter for $3 a tube and tacky glue (use fabric tacky glue if your shoes are on the more flexible or canvas side or glitter glue- i've heard you can wash it!)
paint on a thin layer with a brush and sprinkle on the glitter in sections (preferably in a box with a piece of paper on the bottom) dust off the excess
did a layer of the fine glitter on the bottom wedge part and then a layer of the course, big, chunky glitter over it for depth and so i wouldnt have too many holes of non-glitter showing through. but let each layer dry first!
the straps i thought it would give it more definition to just do the fine glitter
and do a really thin layer of the glue over it so that it didn't look like you were a unicorn farting glitter as you walk down the street. bom chicka wow wow now any drag queen would call you fierce.