India, Feb. 27 -- Team USA figure skating superstar Alysa Liu has been capturing attention after winning a medal at the Winter Olympics. While there's already been a lot of buzz about her smiley piercing, it is a tattoo on her back that is now grabbing eyeballs and giving rise to speculations.

Liu has a piercing through the underside of her upper lip. This is also called a frenulum. Speaking to BBC about her piercing, Liu remarked "I pierced it, like what, a little over two years ago now," and added, "I had my sister hold up my lip, and I was looking in the mirror, and I had my piercing needle," Liu remembered. She also claimed it wasn't painful in the least, in part because "the skin there is so thin, you don't feel it at all."

She rem...