By your request and wanting it marked...

Duffy

Duffy is one of my favourite singers. I knew came to know this singer when I stumbled upon an audition video of an auditioner from a famous talent show.  She was singing "Mercy", one of her many famous songs. In this special tape, she was so hilarious.  , in her (the auditioner) own special and hilarious version. Your sentence is too long and hard to understand, though it may be grammatically correct.

Since then, I had been starting to searching for Duffy's her songs and videos. Then I was amazed by Her angelic voice always amazes me. To me, her voice can be likened to the baby's. It is like a bird twittering in the air, so innocent like a baby's cooing. 

Besides "Mercy", I also like her other songs like her renditions of "Too Hurt To Dance", "Endlessly" and "Breath Away". However, Recently I like "Too Hurt To Dance" is now my favourite the most. I can listen to it repeatedly over and over again. I feel I am and on my way becoming an addict now.

Even as I am writing this notebook entry,  while I am listening to it the song; so moving and beautiful.

Cheers.

Since you requested a formal grading, I am going to give it straight to you.  This is my system and how I go about doing things.  This may be different for others but I will not bulge from my set ways that I feel is the best.

5% on grammar

5% on spelling.

20% on the subject matter

30% on the mechanics, vocabulary ie right choice of words, correct usage of idioms, cultural understanding etc.

40% on expressivity: your writing style; the way you use the language and the flair for words; how your piece comes alive to influence the reader thinking and emotion.

5+5+10+20+20 = 60

Duffy

Duffy is one of my favourite singers. I knew this singer when I stumbled upon a video of an auditioner from a famous talent show singing "Mercy", one of her many famous songs, in her (the auditioner) own special and hilarious version.

Since then, I had been starting to search for Duffy's songs and videos. Then I was have been amazed by her angelic voice. To me, her voice can be likened to the a baby's. It is like a bird twittering in the air.

Besides "Mercy", I also like her other songs like "Too Hurt To Dance", "Endlessly" and "Breath Away". Recently, I like "Too Hurt To Dance" the most. I can listen to it over and over again. I feel I am an addict now.

I am writing this notebook entry while listening to the song. It's so moving and beautiful.

Cheers.

[Very good work.  I like Duffy, too and have her on my iPod]