f(x)'s Amber revealed her own version of the group's teaser image.

On June 30, Amber put together the already-revealed teaser images of the other members with her everyday picture, posting it on her Twitter with the captions: "This is it!"

The revealed picture is edited by Amber herself - The four members' already-revealed teaser images are placed alongside each other, and the last image reveals Amber in a bright red skirt, smiling like a child. Her red skirt signifies their title song "Red Light."

Internet users exclaimed: "I thought Amber's teaser was already revealed!" "Amber has so much wit," and "I laughed so much."

Meanwhile, f(x) has revealed each members' individual teaser images through f(x)'s official homepage and the SMTOWN Facebook page, leaving only Amber's teaser image to be revealed on July 1.