 He also toured several times with Johnny Mathis and also with Andy Williams, who had each sung many of Mancini's songs; Mathis and Mancini collaborated on the 1986 album "The Hollywood Musicals".In 1987 he conducted an impromptu charity concert in London in aid of Children In Need.The concert included Tchaikovsky's 1812 Overture with firework accompaniment over the River Thames.