The Kingston Trio's popularity would be followed by that of Joan Baez, whose debut album "Joan Baez", reached the top ten in late 1960 and remained on the Billboard charts for over two years. Baez's early albums contained mostly traditional material such as the Scottish ballad, "Mary Hamilton", as well as many covers of melancholy ballads that had appeared in Harry Smith's "Anthology of American Folk Music", such as "The Wagoner's Lad" and "The Butcher Boy". She did not try to imitate the singing style of her source material, however, but used a rich soprano with vibrato. Her popularity (and that of the folk revival itself) would place Baez on the cover of "Time Magazine" in November 1962. Baez, unlike the Kingston Trio, was openly political, and, as the civil rights movement gathered steam, aligned herself with Pete Seeger, Guthrie and others. She was one of the singers, along with Seeger, Josh White, Peter, Paul and Mary and Bob Dylan, who appeared at Martin Luther King's 1963 March on Washington and sang "We Shall Overcome", a song that had been introduced by People's Songs. Harry Belafonte was also present on that occasion, along with Odetta, whom Martin Luther King introduced as "the queen of folk music", when she sang "Oh, Freedom" ("Odetta Sings Folk Songs" was one of 1963's best-selling folk albums). Also on hand were the SNCC Freedom Singers, the personnel of which went on to form Sweet Honey in the Rock.