This article is kinda old, but i didn't find it in the forum and it's quite interesting:
http://musformation.com/forensics_of_a_song_katy_perry_hot_n_cold/
And also this one - though it's newer: http://www.newyorker.com/magazine/2014/12/01/sound-sweden
Would be great to get some new articles like this!
They also have some tips on how to make a chorus bigger: http://musformation.com/making_the_chorus_bigger_put_a_pad_on_it/
I'm surprised it's the first time i see this webpage, there are also anaylisis of none-max songs