Thomas Walter Hampson (born June 28, 1955) is an American lyric baritone, a classical singer who has appeared world-wide in major opera houses and concert halls and made over 170 musical recordings. Hampson's operatic repertoire spans a range of more than 80 roles, including the title roles in Mozart's Don Giovanni, Rossini's Guillaume Tell and The Barber of Seville, Ambroise Thomas' Hamlet, and Tchaikovsky's Eugene Onegin. The center of his Verdi repertoire remains Posa in Don Carlo, Germont in La traviata, the title roles in Macbeth and Simon Boccanegra, and more recently also Amfortas in Wagner's Parsifal and Scarpia in Puccini's Tosca.