"Sim ou Não" is a song by Brazilian singer Anitta featuring Colombian singer Maluma. It was released on July 28, 2016 by Warner Music. It was composed by Anitta, Umberto Tavares and Jefferson Junior, while the parts in Spanish were written by Maluma. A Spanish version of the song, entitled "Sí o No" ("Yes or No"), was also recorded by the singer.

"Sim ou Não" is an urban pop and reggaeton song. Lyrically, the song talks about a desire between two people in different environments. The music video for the song was recorded on July 4, 2016 in Mexico City, and was directed by Jessy Terrero.

The music video of the song was recorded on July 4, 2016 in a nightclub in Mexico City, and was directed by the Dominican director Jessy Terrero, who has worked with other Latin artists such as Enrique Iglesias, Anahí, Ricky Martin and Jennifer Lopez.

Anitta recorded the music video for the Spanish version in Los Angeles, California, in November 2016. She had extensions to her hair as she had shoulder-length hair at the time of the shooting. It was premiered on December 9, 2016 on YouTube.

The first performance of the song took place on the Caldeirão do Huck show on Rede Globo on August 6, 2016. Anitta also performed the song on Encontro com Fátima Bernardes on August 17. She also sang on August 23 on her own show, Música Boa Ao Vivo, at Multishow. She performed the song on Programa da Sabrina on August 27 and the next day she sang on Hora do Faro, both programs on Rede Record. On November 9, she performed the song on the stage of X Factor Brasil. All of these performances happened without the presence of Maluma.

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