My Left Foot
When Stewie performs on stage in a wheelchair, he is singing a song about his left foot. This is in reference to a movie called My Left Foot. This movie, directed by Jim Sheridan in 1989, was based on a true story about an Irish man named Christy Brown. He was born with severe cerebral palsy that rendered him completely crippled except for the use of his left foot, with which, he learned how to write and paint.