Ryeo Wook VS Siwon, vocal battle? choi siwonDKPOPNEWS OfficialOct 26, 2014 Share 0 comments Super Junior's Ryeo Wook and Siwon have a vocal battle, guess who's the better singer? Tags: Choi siwon, Kpop, Ryeowook, Video Share Previous articleNext article Leave a comment Name Email Content Post comment