Japanese website animeanime asked their readers: Which anime song from 2015 did you enjoy the most?
The poll ran from December 17 to December 24, 2015, with a total of 550 votes and they were allowed to pick from the pool of songs that was used 2015 for anime openings / endings.
Here are the results:
10) Brave Shine by Aimer (Fate/Stay Night: Unlimited Blade Works)
https://www.youtube.com/watch?v=R7L1QOjv1d0
9) “Shine!!” by the Cinderella Project (The iDOLM@STER: Cinderella Girls)
https://www.youtube.com/watch?v=Ei2s7iGxRPU
8) “Pride Kakumei” by CHICO with Honeyworks (Gintama)
https://www.youtube.com/watch?v=K6HQRAa60II
7) “Shine” by Mamoru Miyano (UtaPri)
6) “Maji Love Revolutions” by ST☆RISH (UtaPri)
5) “Shoujo Koukyoukyoku” by Wake Up, Girls! (Wake Up, Girls!)
4) “Beyond the Bottom” by Wake Up, Girls! (Wake Up, Girls!)
3) “Bravely You” by Lia (Charlotte)
https://www.youtube.com/watch?v=gB5qUxR6ch4
2) “Hanamaru Pippi wa Yoiko Dake” by AOP (Osomatsu-san)
https://www.youtube.com/watch?v=oJ3xY6PXGQQ
1) “Sugar Song to Bitter Step” by Unison Square Garden (Kekkai Sensen)