Can you believe it's already been nearly 4 years since A Pink's debut? And to celebrate, the girls will be releasing a new fan song!

The above photo of the pretty girls of A Pink was released on their official Facebook page, as they each hold up their pinkie. The caption says, "April 19, 2015. The day our promise comes true."

The individual photos of the girls were posted earlier on their Facebook with the caption, "Everyone! Let's promise! What kind of promise do you want to make with me?"�

If you were dying of curiosity by what they meant, their promise is a new fan song for Pink Pandas! The song will be released on April 19, the day of their debut back in 2011. The last fan song "April 19" was written by Chorong herself, and now their upcoming second fan song has been composed by Eunji!

A representative from A Cube said, "To actively reflect the opinions of the A Pink members, who wanted to spend their April 19 birthday with their fans, we've decided to gift the fans with Eunji's self-composed song. Please anticipate a lot as A Pink has prepared a lot for this special day."�