Lady Gaga's former assistant is suing for unpaid earnings.

Jennifer O'Neill, 41, has filed a lawsuit seeking over $380,000 in back pay and undisclosed damages after alleging she worked over 7,168 hours overtime without pay during the 13-month stint she had in the singer's employment.

In the suit, which was filed in Manhattan federal court, Jennifer - who worked for Gaga during her 'Monster's Ball' tour in 2010 - alleges she had to make herself available to the pop superstar at her "earliest waking hour or for spontaneous, random matters in the middle of the night" and in "stadiums, private jets, fine hotel suites, yachts, ferries, trains and tour buses".

Jennifer - who earned $75,000-a-year working for Gaga - also claimed some of her duties included "ensuring the promptness of a towel following a shower, ensuring the availability of chosen outfits and serving as a personal alarm clock to keep Gaga on schedule."

The case has been filed against the 'Marry the Night' hitmaker's touring company, Mermaid Touring.

A spokesperson for Gaga told the New York Post newspaper that the lawsuit is "without merit".