Bby Wow

"Bby Wow" (stylized as "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), which was released on August 7, 2026, through Bichota Records and Interscope Records. Alongside the artists, the track was co-produced Tainy and Omer Fedi. They all additionally co-wrote the track, alongside Andrés Jael Correa Ríos.

Prior to the recording of the collaboration, Judeline had co-written four songs for Giraldo's album, who invited her to perform on "Bby Wow" alongside Rusowsky. "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 track received positive reviews from critics, with some calling it a catchy track and an "unexpected hit". The song was also met with commercial success, peaking at number 29 on the US Billboard Hot 100 and at number one on the US Hot Latin Songs chart, being Judeline and Rusowsky's first number-one song on the chart. It also peaked at number five on the Billboard Global 200, and peaked within the top 10 on national charts in 13 countries, including Giraldo's native Colombia, where it peaked at number one.