

Shoujo Jidai is set to release a Japanese version of "GEE" on October 20th, and will perform the track on Japan's "Music Station" on the 22nd. It seems amidst all the excitement, Tiffany had the Japanese version of "GEE" on the brain, and began to perform their new release instead of the original Korean version.
In the video below, Tiffany realizes her mistake and stops performing to have a laugh with fellow member Hyoyeon.