[Picture] HeeChul introduced Luna as a great singer on Twitter!

Super Junior's HeeChul shared a selca photo taken together with f(x)'s main vocal Luna on his official Twitter account.

He added a caption under the photo saying that Luna is a singer who sings well.

Since he has revealed the selcas taken with f(x)'s members,i think Krystal will be up next since the photos of the other members were revealed!