The next OST for currently airing drama 'She Was Pretty' is coming up! The song "You Don't Know" sung as a duet by SISTAR's Soyu and Brother Su will be released on October 14!

If you're watching the drama, you would have already heard it at the end of the October 7th episode. "You Don't Know" (literal title) is part 4 of the OST for 'She Was Pretty'. Brother Su has just joined Starship Entertainment, the same agency SISTAR is in, and he's already collaborating with Soyu for this OST. We're looking forward to how well they'll sound together.

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The song will be officially released on October 14!