Happy Birthday, Big Mac. The McDonald’s signature burger turns 40 this year and the company has asked MySpace users for their own take on the iconic song. The Takeaway talks about the different ways you can sing two all-beef patties, special sauce, lettuce, cheese, pickles, onions on a sesame-seed bun. Also online, view video of classic food jingles: http://www.thetakeaway.org/archives/stories/104160