Wonder Girls showed off their retro fashion during their filming.

On January 22, Wonder Girls posted a photo on their official Twitter account with an update that read "Guess what this scene is for. We took a quick photo while filming."

The photo of the girls wearing colorful sweat pants and loose tops and holding a colorful towel drew curiosity about where they took the photo. 

Netizens commented, "Yubin, is looking tired your concept?", "So Hui's eyes are closed again.", "Why is Ye Eun holding up that bag?", "What is this filming for?" and etc. 

Meanwhile, Wonder Girls' TV movie titled "The Wonder Girls" is to air on TeenNick on February 2.