1. Seohyun (I'm very sure she didn't have plastic surgery) 2. Sooyoung (She and Seohyun are both natural) 3. Taeyeon (I don't think she did plastic surgery, some people berkata she did her eyelid, but it still looks the same as when she was young) 4. Tiffany (Her skin just got a little lighter, that's all) 5. Yoona (Many berkata she got her nose and jaw done, but I think she just grown older, that's why) / Jessica (She is natural too I guess, but I'm not sure about her jaw) / Yuri (She had eyelid surgery maybe, I guess we'll never know) 6. Sunny / Hyoyeon (Not sure if they did, but I don't think so)