Who is popular today?

Stephen Sondheim arrives at a special screening of "Sweeney Todd The Demon Barber of Fleet Street" at Paramount Studios in Hollywood in December 2007. Photo: Reuters

Broadway composer and lyricist Stephen Sondheim, who helped American musical theatre evolve beyond pure entertainment and reach new artistic heights with works such as "West Side Story," "Into the Woods" and "Sweeney Todd," died on Friday at his home in Roxbury, Connecticut, at the age of 91, the New York Times reported.