I'm rather taken by developments involving an advertisement, a Web cartoon and a catchy tune.
First, Discovery Channel aired an advertisement for itself.
Then, the Web comic XKCD brought out a cartoon entitled 'XKCD Loves The Discovery Channel'. They took the words to the advertisement's 'jingle' and adapted them to their cartoon.
This led Noam Raby and Olga Nunes to produce a video version of the XKCD adaptation of the Discovery Channel advertisement.
Later, Elaine Doyle and Olga Nunes took that video and filmed it with live actors.
Call me soppy, if you like, but I found the whole progression irresistibly cute!