Marie Osmond is embroiled in a court battle with a former manager who is demanding $88,000 in commission after she fired him.

Osmond's legal team claims P. Karl Engemann, who managed the star for 35 years, was dismissed on October 23rd for allegedly acting "in an inappropriate, improper manner and breaching his fiduciary duty to Marie."

However Engemann, whose daughter Shawn is married to TV host Larry King, has hit back with a lawsuit alleging he helped set up her lucrative Las Vegas shows with her brother Donny.

Engemann filed a demand for arbitration on October 27th, according to the Las Vegas Review Journal.

His lawyer Larry Stein tells TMZ.com, "Shamefully, Ms. Osmond has fired Mr. Engemann 18 months into a 5 year written contract and seeks to enjoy the fruits of his labors without compensating him for his work."

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(This news article provided by World Entertainment News Network)