Just checked ASCAP and "Every Day Is A Holiday" is (still) registered. I noticed her total went up from 103 to 105, and the song is actually registered twice; judging by Work ID, the first was "Every Day Is A Holiday" which only has Katy, Sarah, Duke and Hal on the credits, whereas it's been registered a second time as "Everyday Is A Holiday" with Luke as a co-writer.
I swear, if he gets a writing credit just because he changed the title of the song (and made it less grammatically correct)...
