Hairstylists (and married couple) Andrew Collett and Kat Collett might have created the most fun colour technique of all time: squirt-gun hair. The pair have been using small water guns filled with hair colour to create multidimensional hues that they call "splash kaleidoscope" hair. The results are totally mystifying, and it's hard not to fall in love with this style, which creates small horizontal stripes of different shades. Check it out ahead.