Marina and the Diamonds, who BuzzFeed Music readers are already well acquainted with, released "Happy" on Friday, and saw the song shoot up to No. 6 on iTunes and pull over half a million YouTube views almost immediately.

This song sneaks up on you.
It's not hard to see hear why. It very well could be the most understated and subtle song about being "Happy" ever recorded — a real tearjerker. (Don't worry — it's a good cry.)
We are happy (!) to premiere the video for Marina and the Diamonds spectacular "Happy" on BuzzFeed Music today.
It starts with the Welsh-born singer Marina Diamandis crooning over languid piano chords. Quickly a mood is established that seems antithetical to the song's title.
Marina's beautiful and poignant "Happy" lyrics start to come into focus.
Yeah. A bit like that.
You'll probably hear this song covered a lot next year.
The video is directed by Paul Caslin, who does the acoustic videos for Marina on every record.