Alérgico
"Alérgico" () is a song by Mexican singer Anahí released on October 19, 2010. The song is included and taken of the re-release album of Mi Delirio (2009) released as the fourth single. Three versions of the song were recorded, the album version with Anahí only, the Portuguese version featuring Brazilian singer Renne (from Hevo84), included on the deluxe edition (Brazilian edition) from the album, on a duet version featuring Argentinian singer Noel Schajris, released digitally on January 11, 2011, and included on the deluxe edition (Colombian edition) from the album. The song is considered her most successful single from the album in Mexico, since reached number two on the main airplay chart, as well the strong sales in digital marketplaces. Background The song is a pop ballad, co-written by herself and Ana Mónica Vélez Solano, and written and produced by Noel Schajris. It was first presented live at the Awards Kids Choice Mexico, September 4, 2010. It was released as a digital download through iTunes Store, in countries United States, Mexico, Spain, Japan, Netherlands, France, Italy, Germany and Montenegro. Anahí confirmed on MTV Brasil that will be three music videos with three versions: Spanish, Portuguese and one in collaboration