LE SSERAFIM faces vocal controversy at Summer Sonic 2026

K-pop girl group LE SSERAFIM is facing online criticism following their performance at the Summer Sonic Festival 2026 in Tokyo. The controversy stems from a clip of the group's official livestream, which led to allegations that the members were using pre-recorded vocals rather than singing live.

Critics pointed to a moment where members Yunjin and Sakura turned their microphones toward the audience while the vocals continued at a consistent volume. This led to accusations that the group and their label, HYBE, were using heavy backtracks to simulate live singing.

Supporters of the group have defended the performance, arguing that the perceived issue may be a result of the livestream audio mix. Fans have cited audience-recorded videos from the festival floor that appear to show the members' live vocals being audible over the backing tracks.