Siyeon is a fantastic vocalist, probably one of the best if not the best in Kpop (in my opinion). Here is a recommendation, check out her cover of '되돌리다', it is insanely beautiful.
When you see Lee Siyeon pull the headphones off one ear, prepare for liftoff. Yoohyeon's cover of Secret Love Song is powerful like this one. SuA + JiU's Switch to Me is relaxed and and hilarious and has a special surprise.
Some more emotional power vocals from Yoohyeon: "It's not that it can't work, it's just too late now" ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-40sjKex_nNA.htmlsi=p1tjyP8HWUtjxW3R Secret Love Song (Little Mix cover) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_EcOzFLGUzg.htmlsi=9QMJDzpGDcVjBNIT
If you check the comments on Siyeon's cover of 'Speechless', you can see that somebody from Disney Music gave her an applause emoji. They know who she is. :)
Awwwww thank you so much for being here ❤ excited to discover more of these ladies' music. If you have recos, pls feel free to send them my way! It would be nice to know what you personally like 🥰