MICHAEL FAMILY FACES $2B FREEZE-OUT!

IRS problems tie up cash for Jackson's kids and mom

LATE legend Michael Jackson's $2 billion estate is tied up in an ugly dispute with the IRS over taxes, leaving the King of Pop's three adult children ― and ailing 94-year-old mom scrambling for cash while they're iced out of their inheritance, tipsters tattle.

Jackson matriarch Katherine and MJ's kids Prince, 27, Paris, 26, and 22-year-old Bigi, who is also known as were blindsided Blanket by a bombshell legal filing on May 28, sources spill.

In court documents, Jackson's executors John Branca and John McClain argue they cannot "possibly determine what amount could be safely distributed" to the four heirs from their tremendous trust fund until the feds decide on the exact value of Michael's roughly $1.2 billion-plus music catalog - half of which is reportedly being sold to Sony.