[General] Anime OP/ED stuck in your head?

Mekaku City Actors OP

Awwww yeah...pity about the anime.

Tell me about it.... not that it was great in the beginning or anything, but by the end it was just a mess.

Yeah, I'm still clinging to my speculation about the true ending to Kagerou Project...damn Days/Daze is stuck in my head.

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These:

Love it and it is STUCK IN MY HEAD!!! I go around singing:
hantai no hantai no hantai no hantai no hantai no fortune
hontou no hontou no hontou no hontou no hontou no heart

Ouran High School Host Club's OP got stuck in my head for most of the time when I was watching it.
Sword Art Online's, Shugo Chara's first OP, Fate/zero's, and Angel Beats's also got stuck in my head.

Most of the anime that I watch's opening gets stuck in my head. Although nowadays, it's Baby Tears because of DDR. XD

Nagi no Asukara ED <3

One of my favorites that got stuck in my head for a while was the gintama ending song where tehy show that war