Caballé's international breakthrough came in 1965 when she replaced an indisposed Marilyn Horne in a semi-staged performance of Donizetti's Lucrezia Borgia at New York's Carnegie Hall, which earned her a 25-minute standing ovation.
In 1966, Caballé made her first appearance with the Philadelphia Lyric Opera Company as Maddalena di Coigny in Andrea Chénier[REF] and her Italian debut at the Maggio Musicale Fiorentino in Verdi's Trovatore (and Bellini's Il pirata in 1967).