11-yearold Elizabeth Sara Merrick will sing this morning at the New England Walk4Hearing in Brighton. She was born with mild to moderate hearing loss in both ears and got her first hearing aids when she was four. The fifth-grader's sister is seven years old and also hearing impaired. Elizabeth got in the public spotlight last year when she testified before state lawmakers in support of a bill that requires insurance companies to cover up to the cost of hearing aids for children. The bill passed and was signed into Massachusetts law by the governor this summer. For more information on the walk, click here.. Here's a video sample of what she can do.