Ever wonder how President Barack Obama or Kate Middleton let loose on St. Patrick's Day? Well, for Obama, it's a through glass of Guinness, while the Duchess of Cambridge enjoys Harvey's Bristol Creme. Hey, presidents and royalty need to get their drink on too.

While it's nice to see such public stars kick back and act like regular people for a change, nursing some liquor is just the tip of the St. Patrick's Day iceberg. So many people from around the world threw on their best drunken leprechaun outfits and took to the streets in celebration.

Check out how you should have celebrated one of the funnest holidays of the year.

White House on St. Patrick's Day
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White House fountain green on St. Patrick's Day
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President Barack Obama on St. Patrick's Day
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President Barack Obama on St. Patrick's Day
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Sidney, Australia Opera House on St. Patrick's Day
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Kate Middleton on St. Patrick's Day
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St. Patrick's Day parade
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St. Patrick's Day costumes
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St. Patrick's Day parade in London
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St. Patrick's Day parade in Chicago
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St. Patrick's Day parade in London
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