Why 12 instead of 10? Cause there's 12 months in a year so here's 12 songs.
In order of release and one song per group only. Otherwise SNSD would dominate with 3 songs on this list. Not fair.
1. Girls Generation - OH
3. Secret - Magic
5. Wonder Girls - 2 Different Tears
6. 4Minute - Huh
7. Girls Day - Nothing Lasts Forever
8. Sistar - Push Push
9. Rainbow - A
10. Nine Muses - Playboy
11. After school - Bang
12. T-ara - Yayayaya
Sorry to 2NE1 and Miss A fans but I've just never cared for either group.