#REDRED is the breakout 2026 single by CORTIS, a five-member group under HYBE, that turned into a cross-fandom phenomenon on the strength of a simple, infectious “flapping ear” dance challenge. The hashtag marks both the song’s chart run and the TikTok trend that carried it well beyond K-pop’s usual audience.
Origin
CORTIS released “REDRED” as part of the project around their GREENGREEN album, with all five members credited as helping write the song, create the choreography, and direct the music video. The track’s concept plays on color symbolism — moving toward “GREEN” (good things) and away from “RED” (bad things) — a framing that gave the upbeat single an unusually clear emotional throughline.
The Song
“REDRED” leans into a chaotic, high-energy charm that reviewers tied to a wave some dubbed 2026’s “cracked pop.” The single’s signature move — a bouncy, ear-flapping gesture — proved ideally suited to short-form video, where its “so simple it’s brilliant” repeatability made it easy for anyone to copy.
Critical Reception
The release drew strong commercial and chart performance. Coverage reported the GREENGREEN album selling in the millions of copies and the “REDRED” music video crossing 10 million views, while the single piled up wins across major Korean music programs — reaching its ninth music-show trophy by the May 24 episode of Inkigayo.
Social Media & Spread
The “flapping ear” challenge was the engine of the song’s virality. BTS’s J-Hope posted a challenge video, Jungkook was filmed doing the dance at an airport, and members of TXT and ENHYPEN joined in, signaling broad support across HYBE’s roster and the wider #Kpop fandom. The challenge’s low barrier to entry — a few seconds of a recognizable move — made it a natural fit for brands and casual creators alike through May 2026.
Variations & Related Tags
The trend circulated under #REDRED, #RedRedChallenge, and the descriptive #FlappingEarChallenge, all anchored to CORTIS and its label HYBE.
Sources
- https://www.allkpop.com/article/2026/05/cortis-takes-9th-win-with-redred-charismatic-stages-on-may-24-episode-of-inkigayo
- https://respawn.outlookindia.com/pop-culture/pop-culture-news/hybe-cortis-greengreen-album-sales-redred-billboard-spotify-growth
- https://artistrack.com/cortis-redred-single-review-greengreen-album/
- https://www.allkpop.com/video/2026/05/cortis-hits-10-million-views-with-redred