Walmart ran the following commercial in movie theaters and it is quite catchy. It even discusses Facebook and Twitter. Well it looks like it has caught on Walmart has put it on YouTube. It was put on YouTube long after I saw it in the movie theater. They also put a link to the movie on its own website where you can download the mp3, sheet music, or read the lyrics.
I would say it is quite ingenius on Walmart's part to do this, although it was slower than it should have been.