Day 3: A picture of the cast from your favorite TV show.
I watch a lot of TV (or rather, I used to, when I lived with Mom and had cable) and love lots of shows, but this was a no-brainer -- Avatar: The Last Airbender :-D
Alas, I couldn't find a pic with the actual voice cast together (tho you can bet I found tons with the live action actors *gag*) so have this fan art of Team Avatar :-)