Jung Jessica(Jung Soo Yeon). I think so because she can sing very well. Most people think her voice is annoying but its a gift. She can sing high notes and low notes. She improved alot in the song, "The Boys." and she sang a high note in the Drama's Romance Town's OST. The song was Tears are overflowing and I upendo listening to it. Here is my list: 1. Jessica 2. Taeyeon 3. Seohyun 4. Tiffany 5. Sooyoung 6. Sunny 7. Hyoyeon 8. Yuri 9. Yoona