"Bby Wow" is a song by Colombian singer-songwriter Karol G and Spanish singer-songwriters Judeline and Rusowsky, from the former's sixth studio album No Me Arrepiento de Sentir Tanto (2026). It was sent to Spanish radio station as the album's fourth single on September 5, 2026, and released as a single on streaming platforms on September 25, 2026, through Bichota Records and Interscope Records. Alongside the performers, the track was co-produced Tainy and Omer Fedi. They all additionally co-wrote the track, alongside Andrés Jael Correa Ríos.
"Bby Wow" was written in January 2026, during a writing session with Judeline, where they additionally wrote three more songs for its parent album. It was originally intended to be excluded from the album after Giraldo deemed it unfinished, but reconsidered as she felt that the song needed performances from Judeline and Rusowsky, whose music influenced Giraldo. "Bby Wow" is a dancehall and Latin pop track that samples the "Coolie Dance" riddim, leading to comparisons with tracks such as Nina Sky's "Move Ya Body". Giraldo described the track as an emotional song that people can also find theirselves dancing to. Thematically, the song revolves around a lost relationship and sees Giraldo remembering someone she is unable to forget.
The song was met with positive reviews from critics, with some reviewers calling it a highlight from its parent album, and some complimenting its production, sample usage and catchiness. It also received a positive response from the creator of the riddim used. The song was met with a widespread commercial success, peaking at number six on the US Billboard Hot 100 and at number one on the US Hot Latin Songs chart, being Judeline and Rusowsky's first top-10 song on the former and their first number-one song on the latter. It also reached number one on the Billboard Global 200, and additionally topped the national charts in 13 countries, including the artists' native Colombia and Spain.
Background and recording On July 29, 2026, Karol G announced her sixth studio album No Me Arrepiento de Sentir Tanto (2026), during a concert at Rogers Stadium in Toronto, revealing its cover art and confirming its release for August 7 of the same year. During the concert, she revealed that she had spent the "past couple of months" recording the album. Sometime before its release, Giraldo told her team about it and were worried that releasing it without any marketing strategy would interfere with her ongoing . She explained that she wanted to release it because she could not wait to perform its tracks for her fans.
During the album's creative process, Giraldo had been influenced by other music genres, including ambient, indie and pop rock, putting her interest in reggaeton aside for a while. She also contacted Spanish singer-songwriter Judeline to write a few songs for the album. Before this, Judeline had taken a break from writing songs for other artists, but reconsidered as she "felt that it could be a good thing" with Giraldo. After spending three to four days in the studio, Judeline had co-written four songs for the album, including "Bby Wow", which was written in January 2026. It was originally supposed to have Giraldo as its sole performer, but she felt that the song was in an unfinished state and decided not to include it in the album.
Giraldo had been listening to Spanish musician Rusowsky's music over the summer that year, and later found interest in working on "Bby Wow" again, realizing that the song needed performances from him and Judeline. This decision was made during the same week that she was about to announce the album's tracklist. To accomplish this, she spoke with her manager two days before this and requested that both artists record their verses for the song before the next day. Judeline was in her hometown when she got notified and hurried to the nearest recording studio, which resembled a fried fish restaurant from its exterior. After finally receiving the verses, which were recorded remotely in different parts of Spain, she immediately revealed the album's tracklist on August 5, where "Bby Wow" was listed as its 11th track.
Music and lyrics Giraldo wrote "Bby Wow", along with Judeline, Rusowsky, Tainy, Omer Fedi and Andrés Correa, with all but the latter additionally producing it. With a duration of 3 minutes and 45 seconds, "Bby Wow" is an upbeat dancehall and Latin pop track, with elements of alternative pop, reggaeton, R&B, and urbano music, as well as electronic textures. It samples the "Coolie Dance" riddim, which is heard throughout the entire song. Because of the use of this sample, critics compared the track to Nina Sky's "Move Ya Body" and Kat DeLuna's "Whine Up".
"Bby Wow" is a melancholic song in lyrical context, revolving around a lost relationship. The song begins with Rusowsky's lo-fi, avant-pop-like vocals. Then, Giraldo sings about the difficulty of forgetting about a person who still has a romantic interest in her, therefore igniting a possibility of getting back together as a second chance. Fans and various publications speculated that the track was about Giraldo's ex-partner, Colombian singer Feid; the "Wow" in the song's title was thought to reference Feid's ad lib that is heard in his music. Giraldo also felt that her album, No Me Arrepiento de Sentir Tanto, needed an emotional song that people could also find theirselves dancing to, further explaining the concept of "Bby Wow",
Release "Bby Wow" was released as part of Giraldo's sixth studio album, No Me Arrepiento de Sentir Tanto, on August 7, 2026, through Bichota and Interscope Records. As noted by Jessica Roiz from Billboard, "Bby Wow" had already become a fan favorite track soon after its official release. Despite not initially being released as one of the album's main singles nor supported with a music video at the time, it went viral on social media in the coming weeks; this virality can be attributed to Venezuelan group Los Menor3s and their dance to the song. Giraldo stated that the song's growing popularity was a surprise to her, as she was not expecting any commercial success from any of the album's tracks. On September 25, "Bby Wow" was released as a single on digital platforms, with a specific single cover.
Critical reception "Bby Wow" received positive reviews from critics. In a ranking of all 14 tracks from No Me Arrepiento de Sentir Tanto, Jessica Roiz from Billboard ranked "Bby Wow" at number four, additionally calling it "a bop" in a separate article. Pitchfork Maria Nenet Barrios referred it as one of the album's best collaborations, stating that it "hits the mark" that Giraldo's other collaborations from the album, "Ahí" with Drake and "Still" with Bruno Mars in particular, were not able to reach. AllMusic's David Crone named "Bby Wow" as the album's main highlight, additionally stating that it "runs a similar path to success as" her 2023 song "Ojos Ferrari".
Complexs Dimas Sanfiorenzo and Antonio Johri agreed that the track is "one of the better uses of the ["Coolie Dance" riddim], as they flip the familiar rhythm into a melancholy pop banger". Jenesaispop's Gabriel Carey called it an "unexpected hit", calling it a catchy track that "gives off [a] fresh, summery energy". María Munsuri from Vogue Spain complimented the track, commenting that "the angelic voices of [Judeline and Rusowsky] intertwine with that of the Colombian to create a catchy hit from the first listen." Jamaican producer Cordel "Skatta" Burrell, the creator of the "Coolie Dance" riddim that is used on "Bby Wow", responded positively to the track, saying that Giraldo "did a great job" on the song and called it a "child of the 2000s."
Commercial performance Native continents In Giraldo's native country Colombia, "Bby Wow" debuted at number 36 on the Colombia Hot 100 chart, later rising 32 positions to number four in its second week as the chart's Greatest Gainer, earning 933,492 streams in the country. It eventually peaked at number one on the chart, in its third week. Elsewhere in South America, "Bby Wow" reached the top position of national charts in Argentina, Bolivia, Chile, , Paraguay, , Peru, Uruguay. It also reached the top 10 in Venezuela (Airplay) (4).
In Judeline and Rusowsky's native country Spain, the song rose from its debut position of number 30 to number 10 in its second week. In its third week, it rose to number three, just behind two songs by Spanish singer Quevedo. The song reached a new peak of number one on the chart in its fourth week, making it Judeline and Rusowsky's first number-one single on the chart and Giraldo's seventh. It also received a platinum certification in the country.
North America On the issue dated August 22, 2026, "Bby Wow" also debuted at 73 on the Billboard Hot 100, earning 4.5 million streams within its first week of release in the United States. These were both Judeline and Rusowsky's first entries on a Billboard chart. On its fourth week, the song rose from number 29 to number 16 on the chart, making it Giraldo's third top 20 entry on the chart, after her respective collaborations with Shakira and Becky G, "TQG" and "Mamiii". On its fifth week, the song rose to the tenth position on the Hot 100, with 13.4 million streams and 3.8 million radio spins, making it Giraldo's second top-10 track on the chart, after "TQG", as well as Judeline and Rusowsky's first, becoming the first Spanish artists to reach the region since Enrique Iglesias in 2011, with Judeline being the first female Spanish artist to do so. It rose to number seven on its sixth week on the chart, and eventually reached a new peak of number six on its seventh week, making it Giraldo's highest entry on the chart after tying with "TQG" for her highest-charting song a week prior.
"Bby Wow" debuted at number five on the US Hot Latin Songs chart, reaching the summit of that chart a week later, on the issue dated August 29, dethroning Giraldo's own track "Ahí" from the exact position. It has since spent six weeks atop. It also peaked atop the Hot Latin Rhythm Songs and Latin Streaming Songs charts in its second week. In other North American countries, it peaked atop the single charts in Costa Rica (Streaming), El Salvador (Airplay), and Mexico (Streaming), while it reached the top 10 in the Dominican Republic (Airplay) (5), Guatemala (Airplay) (9), Honduras (Airplay) (5), and Nicaragua (Airplay) (7), as well as the Central America airplay chart (3).
Global On August 12, 2026, "Bby Wow" debuted at the 189th position on the daily global Spotify chart. On August 28, it peaked atop the chart, making it Giraldo's second song to reach the summit of the chart, after "TQG" reached that position in 2023. Additionally, Judeline became the first female Spanish artist to have a song peak at number one on the chart. On September 1, it also reached the summit of the daily global Apple Music chart, making it all three artists' first number-one song on the chart. As of September 29, the song had spent 31 non-consecutive days atop the global Spotify chart.