It's actually really cheap to do. I used glue for the bigger glitters and I used a bit of nail polish and also glue for the little ones. Sparkles are really cheap. I don't know if it's going to stay so I'll do an edit in a few days after walking in the rain etc.
EDIT: It actually stayed, and some people even noticed the sparkling when i was walking so it's pretty cool. You could also only put sparkles in the 'holes' because they stay better there, the sparkles on the flat parts rubbed out when I was walking.