An old video of a hilarious conversation between the members of Girls’ Generation has been becoming popular amongst fans.

In the video, which was taken during a past photoshoot for a fashion brand, Yoona was caught making a hilarious joke on Taeyeon.

While Yoona was checking Taeyeon’s clothes and making sure it looked good for the photoshoot, she jokingly dissed the leader’s body by saying, “So flat“.

Seohyun, who was next to the two, bursted into laughter, while Taeyeon seemed surprised at first by Yoona’s sudden diss but started giggling as well. The video showcased the girls’ close friendship, as they could comfortably make jokes about each other.

After viewing the video, fans commented, “Yoona’s ‘ual’ joke causes Taeyeon to have a mental breakdown!“, “It seems like the two are really close friends!“, “Know thyself“, and ”I don’t think Yoona should be saying that…”.