Humpty Dumpty 1935 /An Ub Iwerks Comicolor cartoon
This is one of my favorites of the Comicolor animations...the colors are so beautiful, and there are lots of details and visual jokes that I think are really delightful.
But all you really need to know to be certain it is fantastic is:
A.) There is a very funny & catchy little jingle of a love song (referred to in the title of the post)
and
B.) The villain is just called "The Bad Egg"