Her father, Ferruccio Corradetti, was a noted baritone singer at La Scala and other European venues, and a music critic.
She debuted in 1926 at the Teatro Dal Verme in Milan, playing the part of Coralità in the opera Anima Allegra by Franco Vittadini.
Corradetti had a vast repertoire that included eighty works, of which thirty-five were first performances of a piece, and about a hundred roles, mostly by composers of early Romanticism, such as Mozart and Cimarosa, as well as Verdi, Puccini, and Mascagni.
Among her most famous students were Katia Ricciarelli, Mara Zampieri, Lucia Valentini Terrani, Dunja Vejzovic, and Wladimiro Ganzarolli.
She participated as a judge on the panels of many singing competitions, held conferences and master classes, in Italy and abroad, and for her expertise was assigned artistic direction positions at various institutions.