What do you think of these? They're effectively clip on jewellery for your shoes I quite like them but I don't think I'd bother with them - I prefer shoes that make a statement on their own rather than taking a plain pair and jazzing them up. At £14.99 I think they're a bit expensive for something which I would consider a bit of a frippery, saying that I'd spend that on earrings though so why not shoe jewellery? They attach onto the show with a silicon backing that adheres to the inside of your shoe and can be added or removed "without causing any damage" apparently.
They come in a few other designs too (I've just shown the ones I like best here) and are available fromASOS for £14.99.