Ratliff’s concept about repetition is the opposite of the repetition in general sans. There are some delicate difference, and the slow-changing background music and the changing of the beats between each repetition of some wards in the song. 

I do agree with Ratliff’s  argument regarding the musical element---repetition. Because I think repetition is the element makes the song have the recognizable melody and help the audience to focus on the music, which makes a song more appreciable.

I listened to the We R Who We R, almost every part has the repetition; the end of the second part so let’s go-o-o; the third part has so many repetition at every ends of the sentence like: har-har-hard, our-our-ours, apar-par-part, superstar-star-stars… 

The outside music example: Poker Face by Lady Gaga, is famous because the repetition in this song is so typical, Mum mum mun mah, P-p-p-poker face, oh oh oh oh oh…