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Three singles were released prior to the album's release:
1."Segundo intento", the album's lead single, debuted at #19 and reached #7 in Spain's PROMUSICAE charts' Top 100 Canciones, spending 20 weeks on the chart.[6]
2. "Sentimiento natural", featuring rapper Myke Towers, was released as the second single and debuted at its best position at #7.[7]
3. "6 DE FEBERO" was released as the third and final pre-release single, peaking at #2 in Spain.[8] "CUANDO HABLAS CON EL" was released alongside the album as the fourth single and debuted at #4 on the Singles Chart.[9]
Upon release, Cuarto Azul debuted atop PROMUSICAE's Top 100 Álbumes chart and was certified gold after surpassing 20,000 combined units in its first week on the chart.[10][11] All the songs from the album debuted on the PROMUSICAE Top 100 Canciones chart following its release. That week, both "Segundo intento" and "Sentimiento natural" re-entered the Top 50.[12] Meanwhile, "6 DE FEBERO" climbed from #9 to #8.[8] In Argentina, following the album’s success, "6 DE FEBERO" also peaked at #27 at the Argentina Hot 100.[13]
Following Metamorfosis Season concert series in July, the album returned to peak position for a fourth week atop the Top 100 Álbumes chart and was certified platinum after surpassing 40,000 units sold in Spain.[14][10][15]
In January 2025, the singer published a teaser on her social media platforms that featured a blue bedroom under the title "Nuevo año, nueva era" ("New year, new era").[17] During that same month, Aitana started publishing encrypted messages through her official social media. On May 8, 2025, the singer announced the release date of the album.[18]
Recording
Spanish-Mexican singer Alaska collaborates with Aitana on "La chica perfecta"Mexican singer Kenia Os participated and featured on "Ex ex ex".Puerto rican singer Jay Wheeler collaborates with Aitana on "Duele un montón despedirme de ti"
Cuarto azul is an electropop album, influenced by synth-pop, new wave, Spanish pop and power ballads.[19] The record adopts a slow, ballad-like style, marking a departure from the singer’s previous album, Alpha.[20] While retaining Alpha's sonic influence, its tracks are generally slower and address more mature themes.[21][22]
Aitana presents her fourth album as an emotional journey that begins in darkness, shaped by feelings of resentment, frustration, anxiety, and depression, an atmosphere that is reflected in the opening tracks. As the record unfolds, that darkness gradually gives way to light, a shift that begins to take form with the arrival of the interlude and a voice note to her friends, which serve as a turning point in the album’s narrative.[25]
For the artist, blue represents a safe space, as her childhood bedroom was entirely painted in Klein blue. During the creative process, she went through a particularly difficult personal period, and Cuarto Azul became a way to reconnect with herself by symbolically returning to the place where she grew up and felt most like herself. That connection to her past allowed her to face feelings of being lost from a space of familiarity and comfort.[25]
The album is divided into two parts. The first half is marked by an emotionally dark tone. In contrast, the second half conveys a sense of healing and the recovery of emotions that had begun to fade. This emotional transition is marked by the interlude "Luz de la mañana (interlude)", which acts as a bridge between the two sides of the project.[25]
Release and promotion
Universal Music released the album on May 30, 2025. It became available on streaming platforms, digital download, CD, LP, cassette, and as part of a special box set. The box set included a figurine of Aitana listening to music in her blue room, a CD, and a signed card from the singer. Pre-orders, which were exclusive to fans, began on Friday, May 9, just one day after the album’s release was officially announced.[26][27]
Singles
"Segundo intento" (Spanish for "Second try") was the first song released from the album. It serves as the lead single. It was released on January 23, 2025. The song follows the electropop sound from Aitana's previous work Alpha. Following its release, the song entered and peaked at number eighteen on PROMUSICAE's Top 100 Canciones.[6]
"Sentimiento natural" (Spanish for "Natural feeling") was released on March 13, 2025 as the second single from Cuarto Azul. Featuring Puerto Rican rapper and singer Myke Towers, the song marked a departure from the previous single by incorporating more tropical sounds. In its first week, the song debuted at number seven on the Top 100 Canciones chart, becoming the first top 10 hit from Cuarto Azul.[7]
"6 DE FEBERO" (Spanish for "February 6th") was released on May 5, 2025, as the third single from Cuarto Azul. A Spanish New wave pop ballad, the song became a commercial success in Spain. It entered the Spanish weekly Spotify streaming chart at number eleven with 1,616,894 on-demand streams, despite having only three days of availability.[28] In its first full tracking week "6 DE FEBERO" jumped to number two, accumulating 2,879,617 new streams,[29] and became the second top 10 streaming hit from Cuarto Azul, following "Sentimiento natural". On PROMUSICAE's Top 100 Canciones chart, it debuted at number eight, becoming the album's second top 10 and second-highest debut, also based on only three days of tracking.[30] The following week, it rose to number two,[31] marking Aitana's first top three single from the album and third top 10 overall. It also became her highest-charting single since the Quevedo collaboration, "Gran Vía", which spent three weeks at number one.[32] Following the release of Cuarto Azul, the song saw a resurgence in chart points and climbed from number nine to number eight.[33]
"Cuando hables con él" (Spanish for "Whenever you speak to him") was released on May 30, 2025, alongside Cuarto Azul, serving as the album's fourth and most recent single to date. The track received 547,527 on-demand streams in Spain on its first day and debuted at number four on the Top 100 Canciones chart, the highest debut from the album to date.[34][35][36]
Marketing
The full track list of the album was not revealed immediately. Instead, in the video Aitana shared to announce the project, it was shown that the album would feature 19 songs, including the singles "Segundo Intento", "Sentimiento Natural", and "6 de febrero".[37] On May 14, Aitana officially revealed the song titles.[38] That same day, she also launched a daily countdown series in collaboration with Spotify, releasing one short clip per day leading up to the album’s release on May 30.[39] On May 22, she shared a preview on Instagram featuring snippets of four tracks: "Desde que ya no hablamos", "En el centro de la cama", "Superestrella", and "Ex ex ex".[40]
A few days later, on May 27, Aitana held a listening party at the Movistar Arena in Madrid, where all 19 tracks of the album were presented exclusively for the first time.[27][41] During that same week, she promoted Cuarto Azul across various music media outlets and appeared on the Spanish TV show El Hormiguero.[42] On June 6, an "immersive listening experience" of the album took place at Casa Seat in Barcelona.[43]
On July 31, Aitana announced 24 cities across Europe, the United States, and Latin America where she will perform in 2026 as part of the Cuarto Azul World Tour.[44]
Julieta Chávez of Rolling Stone referred to the album as Aitana's most personal project, noting its intimate and direct lyrical style."[46]
Jessica Roiz, writing for Billboard, commented on the album's lyrical approach and discussed its themes of personal reflection.[47]
In a review for Jenesaispop, Sebas E. Alonso identified synth-pop as a prominent feature and highlighted the 1980s influence on several tracks. Alonso commented that, in his opinion, the album's ballads lacked originality and also questioned the decision to include 19 tracks. He noted the album's focus on personal experiences.[48]
Commercial performance
In the week of its release, Cuarto Azul accumulated 7.49 million on-demand streams on Spotify. Of those, 4.5 million came from Aitana’s home country, Spain, marking the singer’s best streaming debut to date.[49][50]
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