Girl group Girls' Generation's unit TaeTiSeo member Taeyeon made a mistake on stage.

In cable channel Mnet ‘M! Countdown' aired on May 24, TaeTiSeo sang their song 'Twinkle.’

Taeyeon, while singing 'Twinkle,’ cracked up, giving her shaky and unstable voice while singing. Even after her singing part was over, Taeyeon kept trying to stop laughing.

Despite TaeYeon's mistake, however, TaeTiSeo did not cease to get first place in Mnet ‘M! Countdown', officially making them a triple crown of winning first place 3 weeks in a row.