Ouch! Looks like Nas will be stuck for cash for a while - he's got to hand over $2.5 million in unpaid taxes.

The IRS office is demanding the rapper pays the huge figure for taxes owed between 2006 and 2007, totaling $2,584,206, according to papers TMZ have obtained.

This isn't the first financial blow for Nas this year, who was ordered to pay monthly spousal support for estrange wife Kelis and their new born son Knight.