There was a surprise in store for a Mexican musician Sunday at the 2018 Grammy Awards.

Previously unreleased Prince music is “coming soon,” estate adviser Troy Carter tells Variety, although he declined to specify any further details about the recordings.

Puerto Rican singer and world star Ricky Martin gave a free concert at the Zocalo Square in Mexico City, where more than one hundred thousand people gather to sing some of the artist’s greatest hits, including “Disparo al corazón”, “Tú recuerdo”, “Tal vez”, “Livin’ la vida loca”, “Déjate llevar”, “Asignatura pendiente”, “Te extraño, te olvido y te amo”, “Fuego de noche, nieve de día” and “Vuelve”.