"Soft Kitty" is a lullaby recently made popular by Sheldon, a character on the TV show The Big Bang Theory. The original title was (and still is) "Wlazł kotek na płotek". The melody was composed by Stanisław Moniuszko in the year 1849 at a party with his friends as three voice canon.The song's lyrics were originally written by Oskar Kolberg: Wlazł kotek na płotek i mruga, ładna to piosenka niedługa Nie długa, nie krótka lecz w sam raz. Zaspiewaj koteczku jeszcze raz. This instrumental version of "Wlazł kotek na płotek" is performed by Bob Johnson of Polonia Music and features his granddaughter, vocalist Nora Johnson.