What's in my Scetchbook?

What's in my sketchbook #1 2012

I'm going to show you now some of my drawing from year 2012 and now.
I'll hope you like them ;)) 

RIHANNA:
 This is my drawing of Rihanna
 I've draw this at the beginning of this year

 GIRAFFE:
This second one i've discoved at tumblr and copied it. Sorry :((
Im devoid of ideas.

EXPRESSIONISM:

We performed in art class, the topic of expressionism, so i've draw this one.. 
But something i missing on the picutre.. i don't now what:(
What do you think?

 GIRAFFES (part2):

 PSY:

Of course is PSY the best, Korean fighting!!:)
I've draw this after two month of his musicvideo "PSY-Gangnam Style"
But I think it has only become a sketch.