Princess Luna wearing Celestia's attire. Coup, inheritance, whatever the reason as to why she is wearing it is up to the viewer.

Time - 6 Hours 53 Minutes

Watch the process here! --> (link pending)

Artist's note:

-I spent too much time herp derping on the picture, lol.
-Failed at shading personally when I was coloring Luna, though I think I did okay on the hair since its easy to do. xD
-Ghetto towers in the back, don't mind them. lol
-7 hours on this, wow. :I
-I hate the lighting I used on Luna, got lazy, didn't fix.
-The light source was originally going to be in front ofLuna, but that changed when I couldn't figure out how to get the "sunset" colors to work, so I changed it. The light source appears to be like, 5 different directoins now. lol