"No" is a song by Colombian singer Shakira, featuring Argentine singer and musician Gustavo Cerati, from Shakira's sixth studio album Fijación Oral, Vol. 1 (2005). It was written by Shakira and Cerati, who also played the guitar and provided backing vocals to the song. "No" was released as the second single from the album on 5 June 2005, by Epic Records. A pop ballad, the song explores a woman's effort in trying to tell her boyfriend that she no longer wants to be involved in a toxic relationship and that separating is best for the two of them.

"No" received positive reviews from music critics, who called it a "tender" ballad and a "classic heartbreak song". It also fared well commercially, peaking at numbers eleven and two on the US Hot Latin Songs and Latin Pop Songs charts, respectively. An accompanying music video for "No" was directed by Jaume de Laiguana and depicts Shakira in a defunct ship yard. She also performed the song on several occasions, such as Madrid bid for the 2012 Summer Olympics and Los Premios MTV Latinoamérica 2006, as well as including it on the setlist for her Oral Fixation Tour (2006–07).

Although at first Shakira did not know whether she would release an album in Spanish or English, she wanted to work on an album. After attaining crossover success in 2001 with her first English-language album, Laundry Service, the singer wanted to release its follow-up. Shakira, having co-written almost sixty songs for the project, decided to divide the release into two volumes and put herself "on the mission of selecting [her] favorite ones" to the record. Shakira stated that she did the project "because it came out like this" and "that led to two albums". She decided that she wanted to release first a Spanish-language album as part of a two-language bilingual project. This would be the first since Dónde Están los Ladrones? (1998). She said: "The market responded so well to Laundry Service. But what my soul asked me was to release first a record in Spanish. That's what I had to do".

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