...It would be Manic Monday by The Bangles. A close second would be Monday, Monday by The Mamas and the Papas. And if it ever rained where I lived, I would even give golf claps to Rainy Days and Mondays by The Carpenters.
When you consider that most of us will (hopefully) see around 4160 Mondays in our lives, a Monday song is pretty important.
This morning, I'm blaring Manic Monday to get my Monday going strong.