A diamond in a rough!

Who Says by Selena Gomez is the most beautiful and addictive music I've ever heard!!

Again, I am gonna talk about an idiom in the lyric. So, a diamond in a rough is someone or something whose qualities are hidden.

In the case of thia music, it says:
"when you're a diamond in a rough
I am sure you got some things"

Another example: This movie is one of those diamonds in a rough.

Got it???

The video is right down here :P