Lady Gaga.

Merry Christmas, Lady Gaga, you're being sued.

The pop icon was gifted with a lawsuit last week from an ex-personal assistant who claims she was overworked and underpaid. In legal documents filed in Manhattan federal court, Jennifer O'Neill, 41, alleges that Gaga, 25, (real name: Stefani Germanotta) owes her hundreds of thousands of dollars for her 13-month stint as the pop star's right-hand woman during her 2010 Monster Ball world tour.

Among her tasks, according to court papers obtained by the New York Post, was "ensuring the promptness of a towel following a shower and serving as a personal alarm clock to keep [Gaga] on schedule." O'Neill claims she catered to Gaga's every need, at the star's home and in "stadiums, private jets, fine hotel suites, yachts, ferries, trains and tour buses."

O'Neill paints a bleak picture of serving the pop princess. In court papers, she says there were no breaks for meals "or, at times, even sleep." She was obliged to be at Gaga's beck and call from her "earliest waking hour" to "spontaneous, random matters in the middle of the night." She even played a part in the star's legendary wardrobe, "ensuring the availability of chosen outfits" like Gaga's infamous MTV Video Music Awards meat dress.

O'Neill, who was supposed to be paid $75,000 a year, estimates in court papers that she worked 7,168 hours of unpaid overtime. In addition to her back pay, she's seeking unspecified damages.

Reps for Gaga did not immediately respond to ABCNews.com's requests for comment but told the Post that the lawsuit is "completely without merit."