Girl's Day's member Hyeri showed off her sister on the April 14 episode of KBS 2TV's 'Happy Together 3'!  A picture taken with her sister was shown, impressing everybody with their great gene pool.

She revealed, "My younger sister is preparing to become a stewardess."  The picture of her sister shows how she could be a part of a girl group and looks just like Hyeri, too.

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The other people on the show teased her with, "The younger sister seems more like the older sister."  Hyeri agreed with, "That's right.  We hear that a lot.  She's 21 this year.  She told me that she was directly and personally called by the broadcasting company.  Asking her to come out on a program.  I tried telling her that I could go out with her, but she's extremely shy.  I even asked her in advance if I could talk about her on the show and got her permission."  Looks like her sister is a very private person, then, and has no interest in joining her sister in stardom!