Smearing a layer of bird poop all over your face - in the name of beauty - dates back to 17th century Japan, when geisha and kabuki actors would use the technique to repair the damage done to their skin by their lead-based makeup.
Today, for $180, you can receive a one-hour bird poop facial treatment from Shizuka New York Day Spa, complete with a skin analysis, makeup removal, a special foaming cleanse, a green tea mask, and a facial massage.
"Nightingale droppings exfoliate the skin very well, because it has natural enzymes in it," said Shizuka Bernstein, the owner of the spa. "So the natural enzymes exfoliate the skin, and then guanine is in it too, which gives the skin a glow like a pearl."
The manufacturer that Shizuka receives the nightingale droppings from collects the bird poop and then dries it into a powder.
Shizuka then mixes it with water and turns the droppings into a cream before applying it to their patients' faces.
Bernstein immigrated from Tokyo to New York and transitioned her career from a dance instructor to a day spa owner after marrying a dermatologist.
Obviously she is on to something with the bird poop facial, as the spa has been open in its current location since 2005.
This year, it seems as though face masks - especially ones from South Korea and Japan - have taken over social media and beauty trends.
We tried one of the most popular masks - the carbonated bubble mask - on four different skin types to see how they felt afterwards.