Will.i.am likely delighted many a child when he appeared on Sesame Street, but none more than little Atticus. His mom Tresa says:
My son Atticus headbanging to Sesame Street. He has Cerebral Palsy ("The thinking man's palsy!" - Zach Anner) but his love of music will not be denied.
You can read more about Tresa and Atticus at her blog, Reese Dixon.