"Rival" ("Rival") is a Latin pop song written and performed by American singer Romeo Santos and Camila lead singer Mario Domm. Produced by Santos, the track was released in Latin America and the United States as the third single from his debut solo album Formula, Vol. 1 (2011).

Romeo Santos was the lead member of Aventura, an urban and bachata infused band, which sold 1.7 million albums in the United States and had the best-selling Latin album of 2009 The Last. After the band's temporary separation, Santos was announced as the star of an upcoming comedy series to be premiered on ABC. The series will deal with the struggle of a Dominican American fighting his beliefs to success in the United States and will be Santos debut acting job. Following the announcement, Santos signed a record deal with Sony Music Entertainment and recorded his debut studio album, Formula, Vol. 1, which includes most of the tracks in bachata rhythm and bilingual songs such as the lead single "You" and "Promise", featuring Usher.

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