Hosted by Placido Domingo, this special features performances from the 9th annual International Mariachi Festival, a 10-day event held in Guadalajara in which more than 500 mariachis perform in concert halls and street markets. It highlights famous mariachis, including Mariachi Vargas de Tecalitlan, Nati Cano's Mariachi Los Camperos, Mariachi America; and less well known groups from around the world, all gathered to celebrate the passionate music that for the past 100 years has been the beating heart of the Mexican people.