Biglobe Anime One (anime site of the Biglobe portal) held a vote on
2010 Anime Song Best 10, and the result are :

1. Happi Nyuu Nyaa (Mayoi Neko Overrun OP) - Itou Kanae, Inoguchi
Yuka, Taketatsu Ayana : 2449 votes [Oricon weekly highest : 18]

2. Shinryaku no susume ☆ (Shinryaku ! Ika Musume OP) -  : 2284 votes
[Oricon weekly highest : 31]

3. No, Thank You ! (K-ON!! ED2) - Houkago Tea Time (Toyosaki Aki,
Hikasa Youko, Satou Satomi, Kotobuki Minako, Taketatsu Ayana) : 2216
votes [Oricon weekly highest : 2]
4. Utauyo!! MIRACLE (K-ON!! OP2) - Houkago Tea Time (Toyosaki Aki,
Hikasa Youko, Satou Satomi, Kotobuki Minako, Taketatsu Ayana) : 1766
votes [Oricon weekly highest : 3]
5. My Soul, Your Beats! (Angel Beats! OP) - Lia : 1712 votes [Oricon
weekly highest : 3]

6. GO! GO! MANIAC (K-ON!! OP1) - Houkago Tea Time (Toyosaki Aki,
Hikasa Youko, Satou Satomi, Kotobuki Minako, Taketatsu Ayana) : 1613
votes [Oricon weekly highest : 1]
7. Listen!! (K-ON!! ED1) - Houkago Tea Time (Toyosaki Aki, Hikasa
Youko, Satou Satomi, Kotobuki Minako, Taketatsu Ayana) : 1578 votes
[Oricon weekly highest : 2]
8. Hikari no Senritsu (So.Ra.No.Wo.To OP) - Kalafina : 1348 votes
[Oricon weekly highest : 7]

9. irony (Ore no imouto ga konna ni kawaii wakeganai OP) - ClariS :
1148 votes [Oricon weekly highest : 7]

10. Crow Song (Angel Beats! insert song) - Girls Dead Monster (marina)
: 1143 votes [Oricon weekly highest : 7]

Ref :
http://anime.biglobe.ne.jp/feature/201011song_result/


-- 
'CuSO4' Yung