As part of the Katy Perry collection, OPI have introduced a very clever topcoat that produces a ‘crackle’ effect over the nail varnish. It’s quite something to behold because you can watch it fragment on your finger tips in a few seconds. The effect it produces is stunning – really innovative – and a very dramatic look. I’ve worn it over the glittery pink Teenage Dream and also over the eye-catching Kingfisher blue Last Friday Night and it completely lives up to expectations. Shatter has been a complete sell-out, so if you’re thinking of buying, I’d suggest you are quick off the mark!