"MacLachlan attempted to put Lorde with several songwriters and producers to help her producing them, but it failed"..... doesn't read very well, would be better as something like "MacLachlan unsuccessfully tried to set up Lorde with several songwriters and producers to help her with production"
"and from 8 March 2013, the EP was purchased for sales by Universal Music Group and Virgin." (a bit awkward...) → Make this a separate sentence, writing "The EP was (commercially/for sales) released on 8 March 2013 by (those labels).
"They also recorded two other songs, "Million Dollar Bills" and "The Love Club" (Did they record two other songs, Million Dollar Bills and The Love Club, or did they record "Million Dollar Bills" and "The Love Club" (the two other songs)? This sentence is ambiguous. If it's the last option, change the comma and the following space to —.
"Little played all the instruments, including his own drum sample," (I find the drum part a bit confusing... like a drum sample is an instrument. Maybe "[...], while Little played all the instruments, including guitar and synthesizer, and also recorded drum samples.")
There's a Wikipedia guideline (of which I forgot the name) that says AllMusic isn't reliable for composers. Can you use AV media notes instead?
"'Royals' and 'Million Dollar Bills' are the two tracks that criticize the high life" → "Royals" and "Million Dollar Bills" criticize the high life. — prism△19:17, 20 June 2014 (UTC)[reply]