All three albums proved to be successful, reaching multi-platinum status in Spain. 1997–2002: Más, El Alma al Aire, and MTV Unplugged Sanz spent two years in Milan, Italy to work on a follow-up for 3. For the album, he wished to create a "true fusion" of many different sounds, and began studying the saxophone and piano in addition to guitar. In 1997, Sanz released his fifth studio album, Más, a record containing ballads strongly influenced by flamenco, pop, and tropical rhythms. Driven by the singles "Corazón Partío", "Y, ¿Si Fuera Ella?", "Amiga Mía", "Aquello Que Me Diste", and "Siempre Es de Noche", Más sold more than two million copies in Spain and was certified 22× Platinum in the country, making it the best-selling album in Spanish history. The album remained on the Billboard Latin Albums chart for 74 weeks, and one year after the record's release, Sanz was granted an Ondas Award for Best Song for "Corazón Partío". According to David Cazares of the South Florida Sun-Sentinel, the album "made Sanz an international star on the strength of the pop-salsa hit 'Corazón Partío', a song on the lips of fans from Spain to Cuba and the United States." Following the success of the album, Sanz began touring in United States for the first time. His fifth album, El Alma al Aire, released 26 September 2000, featured Sanz exploring a wider array of musical genres, including jazz, R&B, soul and tango. In Spain, the album sold more than one million copies in the first week, breaking the record of one million copies sold in four months, also set by Sanz with his previous album, Más. At the 2001 Latin Grammy Awards, Sanz walked away with four awards: Best Pop Male Vocal Album and Album of the Year for El Alma al Aire, and Record of the Year and Song of the Year for the title track from the album. Later that year, El Alma al Aire was released in a special edition including Sanz's duets with Irish band The Corrs. In October 2001, Sanz collaborated with Michael Jackson and various other artists on the Spanish version of the charity single "What More Can I Give", which benefited the victims of the September 11 attacks. In 2002, Sanz recorded MTV Unplugged at the Gusman Center for the Performing Arts in Miami, Florida. He was the first Spanish artist to record and release