F(x) Amber shared pictures with Girls' Day Minah.

On July 16, Amber posted on her Instagram, "Hi sister, it's been a while. Congrats on your comeback. Bbangminah babo."

In three selfies with Minah, the two of them made comical and cute faces. Minah was in her long wavy brown hair while Amber showed a fashionable red short hair. The two contrasting styles stood out.

In response, people said, "The two must be close, they look good together," "I like Darling and Red Light!" and "The two are so cute."

F(x) recently took the champion song title with their comeback song, 'Red Light' on MBC MUSIC 'Show Champion.'