"Mi Ex Tenía Razón" is a song by Colombian singer-songwriter Karol G. It was written by Karol G, Keityn, Rios, MAG, and Édgar Barrera, and produced by the latter two. From Wikipedia
The Colombian superstar danced with Taylor Swift and other stars to her hit 'Si Antes Te Hubiera Conocido' at the 40th MTV Video Music Awards.
