In this photo taken April 6, 2011, Keenan Cahill, 16, plays with his pet hedgehog in his room at home in Elmhurst, Ill. Cahill has a rare genetic disorder called Maroteaux-Lamy Syndrome, also known as... more 
In this photo taken April 6, 2011, Keenan Cahill, 16, plays with his pet hedgehog in his room at home in Elmhurst, Ill. Cahill has a rare genetic disorder called Maroteaux-Lamy Syndrome, also known as MPS, type 6. Diagnosed at age 2, he has had multiple surgeries because of the illness and has only grown to the height of 4-foot-1. Cahill has become a YouTube sensation in the past three years after posting videos of himself lip-syncing to popular songs. Now celebrities come to him to help them promote their songs and products that they endorse. less 
1 / 1
Associated Press | Photo By M. Spencer Green
Mon, Apr 18, 2011 3:21 AM EDT