Question: Who are the Latin pop duo based in Mexico who became popular after the release of their 2002 debut album and performed at Premio Lo Nuestro 2004?

 They became one of the most popular artists after their solo debut album "Sin Bandera" was released on March 26, 2002. Sin Bandera (which can be interpreted as "Flagless" or "No Flag") is a Latin pop duo based in Mexico that consisted of Leonel García, and Noel Schajris. <SEP> Premio Lo Nuestro 2004 was the 16th anniversary of a popular Latin Music Award show in U.S.  The award show took place In Miami, Florida,which airs LIVE on the Univision Network on Thursday, February 26, from 8-11 pm ET / PT (7-10 pm Central and Mountain).  The show was hosted by Adal Ramones.  There was total of 180 nominations in 32 categories.  The artists who performed in the show were:Ricky Martin, Thalía, Ricardo Arjona, Marco Antonio Solís, Sin Bandera, La Oreja de Van Gogh, Montez de Durango, El General and many more.  The nominees list includes Ricky Martin and Ricardo Arjona, with four nominations each; La India, Marc Anthony, Marco Antonio Solís, Conjunto Primavera, Olga Tañón and Joan Sebastian with three nominations each; Shakira and Thalía with two nominations; and Juanes, Alexandre Pires, Maná, Pepe Aguilar, Vicente Fernández, and many more. <SEP> Magneto was a popular Mexican boy band of the 1980s and 1990s.  The band formed on February 14, 1983.  In 1986, Magneto was featured in "Siempre en Domingo," a Mexican entertainment show viewed across Latin America and parts of Europe.  Mexican teen pop group Magneto emerged in 1983.  Their first record, Dejalo Que Gire came in 1984, followed by Super 6 Magneto.  The Latin pop outfit suffered several lineup changes before achieving their first gold record in 1986.  Mostly playing dance-pop songs, the five-member ensemble started touring Central America after climbing charts with "Todo Esta Muy Bien," and "Soy Un Soñador."  However, their breakthrough came after issuing a Spanish-language version of Desireless' "Voyage Voyage," a French pop hit from the '80s.  In 1992 the boy band played the lead in their own movie, "Cambiando el Destino".  Magneto won the Lo Nuestro Award for Pop New Artist of the Year, and received two nominations for the Lo Nuestro Awards of 1993: Pop Album ("Magneto") and Pop Group of the Year.  Nevertheless, the original Magneto disbanded in 1996 after a sold-out show at Mexico City's Auditorio Nacional. <SEP> Estas Tocando Fuego is the sixteenth studio album by La Mafia.  It was released on October 19, 1991.  The album entered the Billboard Latin Regional Mexican chart at number sixteen.  By March 21, 1992, it reached the number one position and stayed in that position for twenty-three weeks.  "Estas Tocando Fuego" became a phenomenal hit surpassing sales expectations every where.  The record went on to become the first ever million selling album in the history of tejano music.  The band's outstanding performance prompted Sony to present them with the prestigious Premio Cristal, created by the label to honor artist who attain worldwide sales in excess of 500,000 units for a single album.  The album was certified triple platinum, and La Mafia earned Billboard and Premio Lo Nuestro band of the year.  The album tied with Selena's Entre a Mi Mundo for best regional Mexican album of the year at Premio Lo Nuestro 1993.