boho moon tattoos - Google Search. I can see incorporating these concepts into a sternum piece
Black and White Illustrations by Nanami Cowdroy (not really zentangle, but I put it here anyway)
Exotic Body Painting Gallery | Artist: Matthew Amey - Independent Tattoo - Selbyville, Delaware...this is really cool
Creative Illustrations by Beatriz Martin Vidal
Monochrome-1-1 by ~mekhz on deviantART
I adore the dripping effect that blend effects into the background and the color choice is amazing. Her face melds flawlessly into the nature surrounding her face, making a stunning effect.