who is your favorite anime crossover couples?

I think Byakuran X Lucy Heartfilia is my favorite, it just seems to work really well and is actually kinda cute.

sakura(Naruto) and Shun(Bakugan)will make a great couple!

Hanabusa Aido and Chii (vampire knight and chobits)

Akatsuki Kain and Yuuko Ichihara (vampire knight and xxxholic)

Ciel and Victorique (kuroshitsuji and gosick)

I choose Itachi Uchiha X Suzume Mizuno because he's a better cook than her !

Yato (Noragami) X Kazuha (Detective Conan) is my favorite crossover couple