Cassiopeia wrote:How cute!
Why does she look so sad?

Well I made a bit of a side story to go with the picture:
'Every Year, during the winter holidays, Celestia would often go with Luna to see the Northern lights in Neighagra falls, but this year, her sister never came back to take her. She had gone on an important visit to Saddle Arabia for a political delagation. Even though Luna tried to keep in mind that her sister had to take care of important business, she couldn't help but feel abandoned.
So she decided to go alone, and there she was, alone under a wayward streetlamp in the snow fields, the lantern reminding her of her sister's sun. She could do nothing but wait under its curtain of white light, wishing only that her sister was there with her. Rather than enjoy the light show happening all around her, she only stared at the single lantern that dimly lit the snow fields as tattered snowflakes drifted down from the sky.'
To those who don't know MLP:FiM Lore, Celestia is the Princess of the Sun, and Luna is the Princess of the Moon.
@Indinera: Who's Lubi?