"My Reality" is a song, sung by both Mr. Threehorn and his daughter, Cera in the episode "The Bright Circle Celebration", expressing their belief that everything is what it seems to be.
Cera is frustrated with her friends for working on the Bright Circle Celebration, a celebration directed towards pleasing the Bright Circle so it wont go out. Cera thinks the celebration is just nonsense and hard work. She goes home to her father upset, and when he tells Cera that Tria and Tricia are "off on some bright circle celebration nonsense", she is happy that someone else agrees with her. This leads to them singing the song "My Reality".
It's what I call reality
is so plain to see
It's right in front of me
can't argue that
Is no mystery/is just what you see
It's right in front of me/There's no mystery
- During the song, a Pride Rock makes a cameo note this is parody on The Lion King which makes Disney famous.