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R3HAB and Korolova have officially released their anticipated collaboration “Hi Hello.” This track transforms one of Tomorrowland 2026’s most talked-about unreleased tracks into a finished global release.
Arriving on October 23 through Tomorrowland Music, the single connects R3HAB’s mainstage-focused production with Korolova’s melodic house and techno identity. Its official release follows months of appearances in the artists’ DJ sets and a major joint premiere at Tomorrowland Belgium.
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From Tomorrowland MainStage ID to Official Release
“Hi Hello” had already been tested in clubs and festival sets before reaching its defining public moment. This moment occurred during Tomorrowland 2026 in Boom.
R3HAB was performing a MainStage back-to-back set with Afrojack when he invited Korolova to join them. Together, they introduced the collaboration. The performance placed the unreleased track in front of one of electronic music’s biggest festival audiences.
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Footage from the premiere subsequently circulated through 1001Tracklists and electronic-music channels. As a result, the record built recognition well before listeners could access the official version.
According to Tomorrowland Music, R3HAB and Korolova spent much of the year refining the production. Both artists also continued playing it throughout the summer. They used reactions from festival crowds to test its impact ahead of release.
Melodic Emotion Meets Mainstage Power
The production begins with a delicate female vocal and a relatively restrained atmosphere. That introduction gradually gives way to a heavier synthesizer-led build before the track moves into a direct festival drop.
This contrast provides the record with its central identity. Korolova’s melodic influence remains present in the emotional tone and vocal arrangement, while R3HAB brings the structure and physical impact associated with his largest festival productions.
The streaming version runs for approximately two minutes and 37 seconds. An extended mix is also available for DJs. This mix runs for 4:07 at 130 BPM and is listed by Beatport under Melodic House & Techno.
Rather than forcing either artist completely into the other’s musical territory, “Hi Hello” finds a practical meeting point. It balances melodic tension and large-scale dancefloor energy.
Two International Careers Meet on Tomorrowland Music
R3HAB enters the collaboration after more than fifteen years in international dance music. Tomorrowland Music reports that his catalogue has exceeded 13 billion streams. This success is supported by collaborations and crossover releases with artists including ZAYN, Ava Max and Jason Derulo.
Korolova has meanwhile developed one of melodic electronic music’s fastest-growing international profiles. Alongside her global touring schedule, she operates the Captive Soul label. She has climbed from No.60 in DJ Mag’s 2024 Top 100 DJs poll to No.36.
The collaboration also continues Korolova’s relationship with Tomorrowland Music. At the same time, it gives R3HAB another release closely connected to the Tomorrowland environment in which the track was introduced.
“Hi Hello” is ultimately a record shaped by the dancefloor before reaching streaming platforms. Its journey—from an unidentified track in DJ sets to a Tomorrowland MainStage premiere and official release—demonstrates how festival performances continue to function as testing grounds for major electronic productions.
