Lady Gaga shocked a group of lawyers by launching into a foul-mouthed rant about her former personal assistant during a sworn deposition for an ongoing court case.

The "Poker Face" hitmaker is locked in a legal battle with former employee Jennifer O'Neill, who claims she is owed overtime payments from her time on tour with the singer.

O'Neill, who spent 13 months working as Gaga's aide, filed suit against bosses of the singer's Mermaid Touring Company claiming she is owed $380,000 for 7,168 hours of overtime.

Gaga was recently called to give a video-taped deposition in New York as part of the case, and she shocked the legal representatives by raising her voice and cursing profusely throughout the meeting.

During the testimony, obtained by the New York Post, Gaga described O'Neill as a "f**king hood rat who is suing me for money that she didn't earn," adding, "She thinks she's just like the queen of the universe. And, you know what, she didn't want to be a slave to one, because in my work and what I do, I'm the queen of the universe every day."

Gaga went on to admit she doesn't pay any overtime to any of her employees, insisting O'Neill "knew exactly what she was getting into... This whole case is bulls**t."

The pop star claimed O'Neill should have enjoyed her work because she was able to experience Gaga's luxurious lifestyle which included, "(Sleeping) in Egyptian cotton sheets every night, in five star hotels, on private planes, eating caviar, partying with (famed photographer) Terry Richardson all night, wearing my clothes..." adding, "(She was) asking YSL (Yves Saint Laurent) to send her free shoes without my permission, using my YSL discount without my permission."

Gaga also claimed O'Neill was bad at her job because she left the singer to carry her own luggage and unpack her own bags: "She didn't enough lay out all my stuff for me... I can't sift through everything (and unpack my bags). She would only open a couple of bags, and it was very stressful for me... I was very often... moving my own luggage and doing s**t by myself."

Gaga vowed that if she wins the legal battle with O'Neill, she will donate the money her former assistant demanded to her other employees because "I'm not going to give it to her so she can go to Intermix (store) and buy herself a new tube top."