AceShowbiz - Sir Paul McCartney's ex-wife Heather Mills is facing legal action from her former publicists, who allege she tried to fix "The Celebrity Apprentice" to win the show. Bosses at publicity company Parapluie are suing the former model over unpaid fees totaling $168,000, and in the explosive lawsuit they've accused her of lying and cheating.

Mills' former reps claim they lined her up for a stint on Donald Trump's U.S. reality series in 2008, but she refused to accept the gig unless it was guaranteed she would be crowned the winner. Trump snubbed her demand and she was dropped from the line-up, according to Parapluie's lawsuit.

The legal documents, obtained by TMZ.com, also allege Mills only gave a portion of her earnings from "Dancing With the Stars" to charity, despite her vow to donate all the money to a good cause.

McCartney and Mills' marriage ended in divorce in 2008.