Not sure about Soyeon. Shes recovered but maybe not her voice. Boram have been training hard on her vocals before Number 9 comeback. Probably explains why shes getting lots of lines. I remember reading a news saying the other members think Boram have improved her singing and dancing.
Is Soyeon still sick? I heard her sing the last few lines before Jiyeon's dance solo, but her earlier lines were obvious lip syncs... The rest did pretty ok singing live, especially Boram. Not sure if anyone noticed but Boram sounds pretty good nowadays, especially during the Hide & Seek single too! Nevertheless...
DAT FANCHANT THOU