While it appears the Dixie Chicks remain persona non grata at country radio stations, a rare performance aimed at a younger demographic is included on Sesame Street All Star Alphabet, a new home video released by Sony Wonder and Sesame Workshop, the nonprofit educational organization behind the TV series. The Dixie Chicks join Big Bird in harmonizing on "No Letter Better Than 'B.'" The video also features Sheryl Crow and Norah Jones performing separate songs with other Sesame Street characters in segments originally produced for the TV show. The video will be released Tuesday (Sept. 6).