Martínez was born in San Juan, Puerto Rico; she is the daughter of Puerto Rican opera singer Evangelína Colón and Cuban psychoanalyst Ángel Martínez. Martínez' grandparents originated in Spain and France, and migrated to the Caribbean islands. Martínez grew up with a strict Catholic upbringing. She briefly attended the Boston Conservatory as a musical theater major, but dropped out and later received a bachelor's degree and a master's degree from the Juilliard School.
Career
She joined Teatro Colon in Buenos Aires as Rusalka, Opera National de Paris as Luisa Miller, Mimi in La bohéme and for her role debut as Antonia in Les Contes d'Hoffman. She made her debut with the Vienna Staatsoper as Adina in L'elisir d'amore and returned there as Pamina in Die Zauberflöte, Micaëla in Carmen, Mimi in La bohéme, Liù in Turandot and as Cio-Cio-San in Madama Butterfly. In 2006 she was featured in Salzburg Festival's production of Così fan tutte as Fiordiligi.
In 2019 she was appointed Houston Grand Opera's first-ever artistic advisor. In 2020, she was announced to join Rice University's Shepherd School of Music as a professor in the Department of Voice effective as from 1 July 2021.
Martínez proudly represented her birthplace of Puerto Rico as an honoree and performer in the 62nd Annual Puerto Rican Day Parade in NYC. She performed in tribute to operatic legend Justino Díaz at the 44th Annual Kennedy Center Honors (CBS).
Personal life
Martínez met tenor Chad Shelton in 2000; they married and had one son. They divorced about seven years later. She has been living in Houston since December 2002.