Lady and the Tramp (1955)

In Disney's animated film, a musical love story between two cats from differing classes and backgrounds:

• the musical performance of the song: "The Siamese Cat Song," by Aunt Sarah's two trouble-making Siamese cats, Si and Am, who sang: "We are Si-a-me-se if you please. We are Siamese if you don't please"
• the romantic 'spaghetti-dinner' scene of refined cocker spaniel Lady and the scruffy, backstreet roguish stray mutt Tramp at the back entrance to Tony's - an Italian restaurant, sharing a meal of spaghetti and meatballs - when they were nibbling on a strand of spaghetti and met in an unexpected kiss for the first time

Spaghetti Dinner - Kiss

• after being captured by the dog catcher, Lady's encounter with a colorful assortment of dogs in the local dog pound (that performed a memorable chorus of "Home Sweet Home"); Toughy derided her high-class upbringing as "Miss Park Avenue herself," and Bulldog called her "a regular bloomin' debutante" and also asked: "Hey, whatcha in for, sweetheart? Putting fleas on the butler?"
• the vicious fight between the Tramp and a disgusting large rat that snuck into the house and was threatening the Darling's baby in the nursery