Bella Alten operatic career included six Metropolitan premiere performances – Adele in Die Fledermaus (1905), Gretel in Hänsel und Gretel (1905), Saffi in Der Zigeunerbaron (1906), Olga in Fedora (1906), Columbina in Le Donne Curiose (1912), and Lisetta in L'amore Medico (1914). In November 1905 when she sang Gretel in the premiere Metropolitan performance of Hänsel und Gretel, the composer Engelbert Humperdinck was in the audience. This opera received 11 performances that first season and was selected by Theodore Roosevelt's wife as a benefit for the Legal Aid Society. Alten sang Gretel in this opera every season she was with the Met
Opera its complete 2007 production of "Tristan und Isolde". In 2013 season the festival streamed all six of its productions online. In July 2012 the first online community opera was premiered at the Savonlinna Opera Festival. Titled "Free Will", it was created by members of the Internet group Opera By You. Its 400 members from 43 countries wrote the libretto, composed the music, and designed the sets and costumes using the Wreckamovie web platform. Savonlinna Opera Festival provided professional soloists, an 80-member choir, a symphony orchestra, and the stage machinery. It was performed live at the festival and streamed live on