Plenty of songs are censored because of obscene content. I don't see how Happy doesn't rise to this level.
"Obscene content"? I looked through the lyrics again and there's not one curse word throughout the song. Sure, you can insinuate that the lyrics imply vulgar things, but this song is fit for public entertainment. My local radio stations play this regularly and nobody has a major problem with it!
There's a lot of worse songs out there where it's nothing but banging drums and yelling out cuss words and other words you can't even hear it's so annoying. This song is by no means terrible and you're infringing on basic rights. You can somehow justify allowing little children to watch pornography, decriminalizing public urination, legalizing hempfests, or naming derogatory acts after me, but you have no problem censoring an okay song? That's terrible, Governor.