February 8, 2010 6:54 am High Energy ‘Zumba' Workout Gains Popularity zumba danced its way to the states in 2001 and then ignited. An estimated five million people, worldwide, take classes every week. US & World Videos 1:40 Democrats say Big Oil misled public for decades about climate change 1:45 NYPD enters Columbia University in riot gear to clear protest 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look 1:49 New guidelines say women should be screened every other year for breast cancer starting at 40