![Happy kitty, sleepy...
Happy kitty, sleepy...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Happy KITTY, sleepy...
The Big Bang Theory Season 4, Episode 2
![Happy kitty, sleepy kitty
Purr, purr, purr
Happy kitty, sleepy kitty
Purr, purr, purr](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Happy KITTY, sleepy KITTY
Purr, purr, purr
The Big Bang Theory Season 10, Episode 20
![Sleepy kitty...
Sleepy kitty...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Sleepy KITTY...
The Big Bang Theory Season 2, Episode 21
![Sing Sing](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Sing "Soft Kitty."
The Big Bang Theory Season 2, Episode 21
![♪ Happy kitty, sleepy kitty
♪ Happy kitty, sleepy kitty](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
♪ Happy KITTY, sleepy KITTY
The Big Bang Theory Season 12, Episode 19