Group SECRET's member Song Jieun dyed her hair to black after releasing SECRET's 5th mini album "SECRET SUMMER", upgrading in her beauty.

SECRET, who took 8 months to make their comeback after releasing the Christmas song "I Do I Do" in December of last year, revealed matured beauty and confidence through their new song "I'm In Love" that they had not shown before.

Song Jieun especially changed her hair to black hair to match their song, catching much attention.

In the pictures Song Jieun posted on her Twitter, she had long, wavy, black hair. In the polaroid photos, she was sending hearts to her fans.