The parade organizers have asked Giordani to sing "Nessun dorma" from Puccini's Turandot as a tribute to the late Luciano Pavarotti, who made the aria into something of a pop hit.
Giordani — who is currently in New York to appear in Lucia di Lammermoor at the Metropolitan Opera — will perform with pianist Katherine Olsen at approximately 1:40 p.m.
The Columbus Day Parade in Manhattan will be televised by WNBC Channel 4 in New York; check local listings for the broadcast time in your area.