The agency giant's famed choreographer Shim Jae Won, on August 17, shared a 2-minute clip of the three ladies flaunting their fiery dancing skills on his Instagram page. Irene, Seulgi, and Hyoyeon also joined forces for a special dance number during SMTown Live in Tokyo earlier this month. The Girls' Generation's main dancer also released the video on her Instagram and Youtube accounts, along with the caption, "HYO X IRENE X SEULGI Dance Performance... Directed by [Shim Jae Won]. Do we look cool?"

Meanwhile, Hyoyeon recently opened up about Girls' Generation's spontaneous get-together when she made a special appearance at MBC's "Kim Shin Young's Hope Song At Noon."

In this episode, DJ Kim Shin Young told her, "It was Girls' Generation's 12th debut anniversary a while ago. I saw on social media that you guys got together to have a party."

Hyoyeon replied, "It's not easy for the members to get together, but I thought we should at least blow out the candles. We decided to reunite with a glamorous concept for our dress code, but I didn't really check our group chat. I went after checking just the location, but they all backed out on the concept idea. If you look at the photo, I'm the only one who looks fancy. Everyone else is wearing comfortable clothes."

She went on, "I took four sets of clothes, but they cancelled the plans [for the concept] because they thought that it'd be a hassle. They decided to order their own delivery food instead. I brought the cake though. We rented a hotel room for our party."

The pioneering group's main dancer also revealed that Sunny is often the slowest one to reply in their own group chat. The funny part is that Sunny is the administrator of one of their GCs.

"The 'Invincible Youth' team still has a group chat, and Sunny is the manager. She's super talkative there. I'll have to put this in [our] group chat and kick her out," she shared.

Hyoyeon furthered that Yuri and Yuna used to be the ones who would always send videos in the group chat and ask everyone else to watch them.