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Listen Live Graphics (Indy)

Kelis apparently took away one very important life lesson from her ex-hubbyNas … mainly how NOT to pay her taxes … to the tune of $300,000.

According to a tax lien filed in NYC, the government wants Kelis to fork up over $330,426.71 in unpaid taxes for the years 2004 and 2010.

Both 2004 and 2010 were good years for Kelis. In 2004, the “Milkshake” singer went on tour with Britney Spears. In 2010, she headlined her first US tour with singer Robyn.