Have you seen the latest trend of undercut hairstyles with hair tattoos that has been sweeping Instagram and Pinterest? For the ladies who enjoy bringing something new and different to the table, or in this case their hair, these intriguing haircuts and use of colors are very much a thing to be looking into. Trends such as this are common, appearing out of the blue and disappearing just the same. But to date, no one really thought about peek-a-boo hair tattoos on your head that actually uses your hair instead of ink, making it a rather awesome way to show off your originality. The style involves no needles, instead using a razor to shave intricate patterns within an undercut.