Why?

Well....
Here's a hint:
 




1.

2. BIRTHDAY CAKE :D

Got it?
Yes, that's right, it's...
NINOMIYA KAZUNARI'S BIRTHDAY!!!!!!! *cue massive orchestra performance of Happy Birthday :D*
My beloved Arashi ichiban is 26 *cough* I mean, 17! (for the 257759035786th time :D)

 ( This. of course, means a massive BIRTHDAY POST 8D )

Nino-chan, thank you so much for the wonderful, entertaining things you've given us fans, be it a concert, a talk show, a radioshow; you've always given it your best. And us fans truly, honestly thank you for doing that! :) Stay healthy and happy with all of Arashi for us! :D In short,

HAPPY BIRTHDAY NINO-CHAN~~~~~!!!!!!!!! ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥ x a trillion!