A new fancam from TWICE’s ongoing world tour This Is For has ignited heated debate among K-pop fans, as Nayeon, the group’s main vocalist, was accused of lip-syncing during a live performance.

The viral clip, which captured TWICE performing their hit track I Can’t Stop Me, shows Nayeon exuding confidence and charisma on stage. However, several fans noticed moments when she lowered her microphone to execute dance moves — yet her vocals continued flawlessly through the speakers. This has led to widespread claims that the idol may have been lip-syncing during the set.

The allegations have caused disappointment among some fans, especially since Nayeon has long been regarded as TWICE’s “ace vocalist,” praised for her stability in live performances at major award shows and international events. Critics argue that after a decade in the industry, such a mistake is “unacceptable” for a main singer of one of K-pop’s top-tier girl groups.

However, other fans have come to Nayeon’s defense, noting that using a backing track is common practice in large-scale concerts. They argue that maintaining consistent sound quality while executing complex choreography is nearly impossible without some level of pre-recorded support, particularly in outdoor venues with unpredictable acoustics.

This incident has revived old discussions surrounding TWICE’s live singing capabilities. In their early years, the group often faced similar accusations, though many attributed it to their inexperience and the intensity of their choreography. Critics now argue that such explanations no longer hold weight given the group’s senior status in the K-pop scene.

Adding to the controversy, older clips resurfaced showing Nayeon allegedly “forgetting” to keep her mic near her mouth while her voice continued to play, fueling suspicions further.

Despite the criticism, loyal fans have pointed to numerous examples of Nayeon singing live — including her lauded performance at the Victoria’s Secret Fashion Show 2025 — to counter claims that she relies on lip-syncing. Many argue that the recent viral clip is being taken out of context, and that it is unfair to judge her overall talent based on one performance.

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As the debate continues, the incident highlights the persistent tension in K-pop between the pursuit of flawless visuals and the expectation of authentic live performance. Whether Nayeon addresses the controversy or not, her stage presence remains undeniable — but so does the scrutiny that comes with being one of K-pop’s most recognizable voices.