6. 'The Star Spangled Banner'
Houston's rendition of "The Star Spangled Banner" is considered by many to be the definitive recording of the National Anthem. Her version was released as a charity single and ended up topping the pop charts. Charity or no charity, it's pretty amazing to get so many people to pay for a recording of a song that is performed at pretty much every sporting event and ceremony across the country on a daily basis.