SM Artists oldest to youngest:
 

1. Kangta
2. Leeteuk <3
3. Heechul <3 
4. Yesung <3
5. Kang In <3
6. Shindong <3
7. Sungmin <3
8. Yunho
9. Eunhyuk <3
10. Zhoumi <3
11. Donghae <3
12. BOA
13. Victoria
14.Siwon <3
15.Ryeowook <3
16.Changmin
17.Kyuhyun <3
18.Taeyeon
19.Jessica
20.Sunny
21.Tiffany
22.Hyoyeon
23.Henry <3
24.Yuri
25.Onew
26.Sooyoung
27.XiuMin ♥
28.Jonghyun
29.Luhan ♥
30.Yoona
31.Kris ♥
32.Suho ♥
33.Seohyun
34.Key
35.Lay ♥
36.Minho
37.Baekhyun ♥
38.Amber
39.Chen ♥
40.Chanyeol ♥
41.D.O ♥
42.Tao ♥
43.Taemin
44.Luna
45.Kai ♥
46.Sulli
47.Sehun ♥
48.Krystal

(cr: EXO Indonesia sr:thislittlefanboy)