Eric Nam and Crayon Pop's Ellin revealed another side to their close friend f(x)'s Amber on '4 Things Show'!

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Though Amber is known for her tomboyish style, Eric Nam says that she's still a girl at heart and very sensitive. He also shared that Amber was originally cast by SM Entertainment as a vocalist. By the Han River, Amber hangs out with her good friend Ellin, where they dance to each other's hits and kid around.

Check it out above!