So Hee disclosed a photo of Wonder Girls in them middle of their concert rehearsal.
On 2nd, So Hee uploaded the photo on her Twitter and wrote, "For 777. July 7th 7 PM. For Wonder Girls' solo concert."
The photo shows So Hee and other Wonder Girls members preparing for their concert.
Netizens made comments, such as "Triple lucks!", "See you at the concert", and "They are always doing their best."
On the other hand, Wonder Girls will be having their first solo concert in 3 years at Seoul Olympic Stadium.