KISS singer: I'm deaf in one ear

Stanley was born with a Level 3 Microtia, which is a congenital deformity of the cartilage of the outer ear, and occurs in approximately 1 out of every 8,000 to 10,000 births.

Source: http://rss.cnn.com/~r/rss/cnn_health/~3/fL8LltlJ2tg/index.html

example here as example as an example explained here