During the press conference for 'Best of Best' on August 6, duo Baechigi talked about their featured artist, Solji, expressing their genuine surprise at her singing capabilities (which you think they'd have already known about before signing her on).

They said, "When we worked with Solji of girl group EXID, she really took one shot to sing the song with no lapses, so we were shocked.  We had thought, well, she's an idol... but she sings better than an average vocalist, so we were completely shocked," showing that they might not have had super high expectations at first, but they came to realize she was beyond an idol and even beyond a vocalist.

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"When working with Sweet Sorrow, they pile chords onto each and every note.  We saw that she hit every chord with accuracy, so we were in awe every time as we worked," they continued.  "The two songs were both worked on beyond our expectations, so we were completely taken aback."

Yes, there's no doubt Solji is an amazing singer!  Keep an eye out for her future works.