Mexico was represented at the OTI Festival 1978 with the song "", written by Lolita de la Colina, and performed by Lupita D'Alessio. The Mexican participating broadcaster, Televisa, selected its entry through a national televised competition with several phases. The song, that was performed in position 13, placed third out of 19 competing entries, with 44 points.
Televisa held a national competition with four televised qualifying rounds and a final to select its entry for the 7th edition of the OTI Festival. This seventh edition of the National OTI Festival featured thirty-nine songs, of which ten reached the final. In addition to the general competition, awards were given for Best Performer, and Best Musical Arrangement, among all the competing artists.
The shows were held at Teatro de la Ciudad in Mexico City, were presented by Raúl Velasco, and were broadcast on . The musical director was , who conducted the Single Union of Music Workers of Mexico orchestra when required. Hermanos Zavala, the single mixed backing choir of five voices, were credited on the songs they accompanied.
The four qualifying rounds were held on Saturdays 16, 23, and 30 September, and 7 October 1978. The ten highest-scoring entries among the thirty-nine competing advanced to the final.
The final was held on Sunday 22 October 1978. Fifteen expert jurors present in the hall, and five remote provincial juries located in Monterrey, Nuevo Laredo, Mérida, Torreón, and Guadalajara, scored the entries.
The winner was "", written by Lupita D'Alessio and performed by Lolita de la Colina; with "", written by and performed by Lila Deneken, placing second; and "", written and performed by Emmanuel, placing third.
Lila Deneken received the Best Performer Award; and Chucho Ferrer the Best Musical Arrangement Award for "".
Las 10 finalistas del Festival OTI 78 is the official compilation album of the seven edition of the Mexican National OTI Festival, released by Sistema Radiópolis in 1978. The vinyl LP features the studio version of the ten songs qualified for the national final.
On 2 December 1978, the OTI Festival was held at the Municipal Theatre in Santiago, Chile, hosted by (TVN), (UCTV), (UTV), and (UCVTV), and broadcast live throughout Ibero-America. Lupita D'Alessio performed "" in position 13, with Chucho Ferrer conducting the event's orchestra, and placed third out of 19 competing entries, with 44 points.
Each participating broadcaster assembled a jury who awarded 5âÂÂ1 points to their five favourite songs in order of preference.