Jessica and Krystal releasing a song together? We are still hoping but while waiting for that, why don't we check out their previous collaboration performances first.

Here are the Jung Sisters showing us that beauty is not the only thing that runs in their genes~

Jessica singing 'Take a Bow' and Krystal joined her later on to sing 'Tik Tok', 'California Gurls', and 'Butterfly'. ( This was during their fan meeting for Li-ning )

Yes, someday we will see them together on stage again, and to wrap it up, here's Jessica singing 'Someday' while Krystal plays the piano.