We’ve recently seen a slew of innovative top coats, but this one takes the cake. YSL is set to launch a collection of 4 polishes that each contain three different finishes in the same bottle. Mind blowing, yes it is. Each bottle is composed of a sparkle, sheer solid and clear gloss top coat, which gives a ‘gradation effect’ much like your favorite dip-dyed T-shirt. How it works: pull the brush out of the bottle and swipe over your mani for a gradient top coat effect, or you can opt to shake and mix all three together if you prefer the same look all over. The YSL La Laque Couture Tie & Dye Top Coat Collection ($25 each) includes a Cool Coat (melon), Pop Coat (fuchsia), Hip Coat (lilac) and Ice Coat (royal blue), and will be available starting in May. Seriously though, what will they think of next?