# Judeline helped write the world's biggest song

> Karol G's "BbY WOW" is number one on the planet, and one of its co-writers is still catching her breath.
- Title: Judeline helped write the world's biggest song · Rolling Stone
- Summary: Karol G's "BbY WOW" is number one on the planet, and one of its co-writers is still catching her breath. Nobody in the room can predict which song connects…
- Keywords: music, karol g, judeline, latin pop, songwriting, helped, write, world's, biggest, song, Rolling Stone
- Source: Rolling Stone — https://rollingstone.com/music/music-latin/bby-wow-karol-g-judeline-collaboration-1235625831
- Author: Julyssa Lopez
- Published: 2026-09-13T19:23:13+00:00
- Read time: 1 min
- Topics: music, karol g, judeline, latin pop, songwriting
## A club track went global
Karol G's smooth club song "BbY WOW" has climbed to number one on both Spotify and the Billboard Global 200 over the last few weeks.
## The numbers keep climbing
78 million Spotify listens and 37 million YouTube views, and the song is still growing rather than cooling off.

> The song is a streaming juggernaut
## Karol didn't do it alone
She brought in Spanish producer-artist Rusowsky and Spanish singer-songwriter Judeline to sing on the track with her.
## Judeline was already inside the album
She was one of Karol's most trusted collaborators on "No Me Arrepiento de Sentir Tanto," the record "BbY WOW" belongs to.
## Four writing credits deep
Judeline helped write the hit and has credits on three more tracks: "Matadora," "Te Llevas To" and "Final Feliz."
## She never saw it coming
Judeline knew Karol's reach would carry the song, but the scale of it caught her off guard, and she's been celebrating since.

> No one knows what song is going to connect most with people, so we've been celebrating.
## Key takeaway

Nobody in the room can predict which song connects, not even the people who wrote the hit.