"El Toro Relajo" (Eng.: The Partying Bull) is the title of a popular mariachi song written by Felipe Bermejo and has been recorded by several artists. Selena recorded the song in 1994 for the soundtrack of the 1995 film Don Juan DeMarco.
Enrique Lopetegui of the Los Angeles Times wrote: "But it's the two new Spanish ranchera songs [El Toro Relajo and Tú Sólo Tú], backed by El Monte's Mariachi Sol de Mexico, that are most impressive, as Selena effortlessly adapted to a difficult style she wasn't very familiar with."
The song was included on the album Dreaming of You, recorded by Selena, and was released as the fifth single from that album (the second in Spanish). The single could not match the success of the previous singles in the BillboardHot Latin Tracks, peaking only at number 24.