These are the video clips that cause ear-to-ear smiles. From the mini pig that plays the piano, to a cat that prefers the friendship of a dolphin! Today, we count down the most tremendous videos from the web!

Can dogs be inspired by music to dance? Which breeds can walk on their hind legs? On this special presentation of America's Cutest Dog, we'll count down the cutest doggie clips in the web-o-sphere and meet some of the cutest dogs you've ever seen!

How many hours do cats sleep a day? Do cats imitate humans? Are cats and dogs mortal enemies or best friends? On this special presentation of America's Cutest Cat, we'll count down the cutest kitty clips in the web-o-sphere.

From talking dogs and dogs that doze to head-tilting wonders, we're counting down the cutest clips in the web-o-sphere to crown one and only one, America's Cutest Dog.