Girl group A Pink's member Namjoo promoted boy group BTOB's new song.

On December 3, Namjoo posted on A Pink's Twitter, "Can I cry? Santa is single too. Am I addicted to 'Luv' and 'You Can cry'?" along with a picture.

In the picture, Namjoo is first closing her eyes and holding up her thumb, then making an L with her fingers.

Internet users who saw this commented, "Addicted to both songs," "Don't cry," and "Go A Pink and BTOB."

BTOB released their winter special single "You Can Cry" on December 3.