was heard with the Jerusalem Symphony in Verdi's Messa da Requiem. Opera houses and performances Since 1991, Crider has been heard regularly in the world's great opera houses, including the Royal Opera House Convent Garden, The Metropolitan Opera in New York, San Francisco Opera, Los Angeles Opera, the Berlin State Opera, the State Opera Houses in Vienna, Munich, Berlin, Hamburg, the Teatro alla Scala in Milan, the Arena di Verona, Rome, Zurich, Barcelona and Madrid. Crider has enjoyed a successful concert career. She has appeared at the Salzburg Festival, the Maggio Musicale Fiorentino, in Orange, Ravenna and Edinburgh, at the Royal Albert Hall London, Carnegie Hall, the Alte Oper in Frankfurt, Savonlinna, the Salle Pleyel and Barbican Hall in London with orchestras such as the London Symphony Orchestra, the London Philharmonic Orchestra, Vienna Philharmonic, National Orchestra of Paris, Berlin Philharmonic, Oslo Philharmonic, Israel Philharmonic Orchestra and the WDR Symphony Orchestra in Cologne. She has collaborated with conductors such as Riccardo Muti, Daniel Barenboim, Zubin Mehta, James Levine, Nello Santi, Christoph von Dohnanyi, Semyon Bychkov, Seiji Ozawa, Riccardo Chailly and Sir Colin Davis. From the time of her American debut in a new production of Aida in 1996 at the San Diego Opera, Crider has enjoyed a busy international schedule of engagements. 1997–1999 In 1997, Crider debuted at the BBC Promenade concerts under Sir Colin Davis with Verdi's Messa da Requiem, followed by her first appearance with the London Philharmonic Orchestra in Beethoven's Ninth Symphony. She was invited to the Edinburgh Festival to sing Mahler's Second Symphony conducted by Mariss Jansons. In the same year she made her Japan debut in Tokyo with Verdi's Requiem under the baton of James Levine. During the 1997/1998 season, Crider sang in a new production of Aida at the Dresden Semperoper. Three more opera house debuts took place in 1998: in July she sang in Un ballo in maschera in the Arena di Verona under the conductor Daniel Oren, followed in September by Madama Butterfly at the Bastille Opera in Paris and finally Aida at the Bavarian State Opera in Munich. The year 1998 came to an end with her return to the Vienna State Opera in December where she sang the role of Elvira in a new production of Ernani under the musical direction of Seiji Ozawa. In February 1999, she gained critical praise for her interpretation of Leonora in Verdi's Il trovatore at