IU uploaded a photo on her Twitter on Friday saying "Haemmi Unni's birthday party photos. I wish the four of us could do talk show when Sunggu and Haemmi debuts."

In the sticker photos, IU can be seen posing victory with three friends.

In the sticker photo, MBLAQ Thunder with bleached hair is spotted also.

Internet users who saw the sticker photo replied "IU and Thunder already knew each other?" and "Those four looks like they are on double date."

Photo Credit: IU Twitter