I take it you don't use Twitter?
haha There's a list of topics on the side of Twitter that are currently really popular (aka- a lot of people are mentioning them in their tweets.) If enough people add #HappyBirthdayHikki & #Utada (or one or the other) to their tweets frequently enough-- it'll get on the list for everyone who uses Twitter to see.
The only J-Pop related thing I've ever seen on Twitter was something about ARASHI... I forget why. It was only a few weeks ago though.