My favourite is this lovely deep purple with a hint of shimmer called Atomic Violine.
After two days of wear I was inspired by Klairedelys' tutorial and decided to try out some glitter french tips. I did mine slightly different as I used a flat liner brush to apply MAC's 3D silver glitter so I could shape the tips. I know it's not exactly a good combo, but I was just playing around and thought I would show you guys :). Next time I would just use a neutral nail varnish and a coloured glitter.