I'll start off with my favorite commercial for this 2012: Hooray for Today! Mc Donald's New Campaign for their array for their Breakfast Meal.
Personally, I adore the approach they've made on their latest campaign and it sparks as something "relevant" and suggests a "necessary whimsical treatment" to our fast-past modern life. Better yet, start your day not only with treats from one of the world's highest-earning fast food chain, but also break the boring breakfast with a smile and a colorful perspective to an expected busy and stressful day.
I'm starting to have an LSS (Last Song Syndrome) with this tune but hey! It wouldn't be that bad since it brings out a cheerful mood in me.