The original line art was drawn for a 'coloring book' thread on a messageboard I went to. Knowing that most of the people on the board aren't really artists themselves, I also took a shot at it and this is my version. (Yes, it's my artwork. I just have a cartoony style. Just in case anyone was confused.)
I made her an alien because I figured no one else would. :) Planet was done by using a Photoshop brush/stamp.