Thank U and Happening Here

[PinkShinigami]

I am sorry to make a thread for this, but the search function on this forum is unfortunately useless.

Can somebody please tell me about these two songs, Thank U and Happening here? I have not been following the news much, so I don't really know what it is. What I mean is, what are they made for, how are they release etc.
And please, if there is anything else new I should know... xD

And also, does anybody have a download link for Thank U? I really can't find it.

Thank you