I love these nails from the Jen Kao Spring 2012 collection! They flow from black to bright blue.. Ombre at it's best! Although these were nail extenstions by CND, the backstage make-up artist recommended a DIY version by applying one colour to the bottom of the nail and another colour to the top, so that they overlap slightly, and then, whilst they're still wet, applying a generous layer of clear top coat on top, to make the nail polishes run into eachother. If anyone tries it, let me know if it works!
Images via CND