Brazilian pop star Luísa Sonza made her Tomorrowland Belgium debut on Friday, July 24, appearing as a special guest during Dutch electronic trio Kris Kross Amsterdam’s set at the festival in Boom, Belgium. The performance marked the first live rendition of their collaborative single “My Oh My,” which also features French singer and producer Willy William.

The surprise appearance took place on The Great Library stage during Tomorrowland’s second weekend. Festival organizers updated the official lineup shortly before the performance to include “Kris Kross Amsterdam ft. Luísa Sonza,” confirming the Brazilian singer’s guest spot.

“My Oh My” was created after Kris Kross Amsterdam connected with Willy William backstage at the Q Music Awards. Looking to complete the track with an international pop voice, the producers invited Sonza to join the project, bringing her signature Brazilian pop style to the release. Speaking about the opportunity, Sonza said she was honored to represent Brazilian pop music at a festival that welcomes attendees from more than 200 countries.

The Tomorrowland performance adds another international milestone to Sonza’s career, which has included collaborations with artists such as PRETTYMUCH, Danna Paola, Aitana and Katy Perry. Her appearance introduced her music to one of the world’s largest electronic dance music audiences while expanding her growing global profile.

Tomorrowland Belgium 2026 is taking place across two weekends, July 17–19 and July 24–26, under the theme “Consciencia.” The sold-out festival features performances from leading electronic artists including Martin Garrix, Steve Aoki, David Guetta, Calvin Harris and Armin van Buuren, with Sonza’s guest appearance standing out as one of the notable crossover moments of the second weekend.