She then claimed Diplo eventually invited her to his personal room, and his security team started kicking out everyone else, including a male friend who was allegedly punched in the face when he refused to leave without her.
Diplo allegedly told the woman she couldn't leave until she performed oral sex acts on him, and after realising there was no way out, the woman says she agreed.
She also claims Diplo filmed the encounter without her consent.
Bryan Freedman, the attorney for the "Genius" musician, denied the allegations shortly after the lawsuit was filed.
The attorney also claimed there was a link between this woman and Marchel Gabrielle Auguste, who is also currently suing Diplo for sexual battery, and said neither woman is telling the truth.
In a statement, Freedman said: "This complaint is completely outrageous, wildly untrue and yet also entirely predictable, given that it simply repeats the exact same claim already made by the plaintiff's friend Shelly Auguste, an individual who has been harassing Mr Pentz and his family for more than a year and already has repeatedly violated the restraining order issued against her.
"We have irrefutable evidence that this is a completely meritless claim and we will be providing it to a court as quickly as we possibly can to put an end to this shakedown by Ms Auguste and her accomplices once and for all."
Where to get help:
• Lifeline: 0800 543 354 (available 24/7)
• Suicide Crisis Helpline: 0508 828 865 (0508 TAUTOKO) (available 24/7)
• Youth services: (06) 3555 906
• Youthline: 0800 376 633
• Kidsline: 0800 543 754 (available 24/7)
• Whatsup: 0800 942 8787 (1pm to 11pm)
• Depression helpline: 0800 111 757 (available 24/7)
• Rainbow Youth: (09) 376 4155
• CASPER Suicide Prevention
If it is an emergency and you feel like you or someone else is at risk, call 111.
If you're in danger now:
• Phone the police on 111 or ask neighbours or friends to ring for you.
• Run outside and head for where there are other people.
• Scream for help so that your neighbours can hear you.
• Take the children with you.
• Don't stop to get anything else.
• If you are being abused, remember it's not your fault. Violence is never okay.
Where to go for help or more information:
• Women's Refuge: Free national crisis line operates 24/7 - 0800 refuge or 0800 733 843 www.womensrefuge.org.nz
• Shine, free national helpline 9am-11pm every day - 0508 744 633 www.2shine.org.nz
• It's Not Ok: Information line 0800 456 450 www.areyouok.org.nz
• Shakti: Providing specialist cultural services for African, Asian and Middle Eastern women and their children. Crisis line 24/7 0800 742 584
• Ministry of Justice: www.justice.govt.nz/family-justice/domestic-violence
• National Network of Stopping Violence: www.nnsvs.org.nz
• White Ribbon: Aiming to eliminate men's violence towards women, focusing this year on sexual violence and the issue of consent. http://www.whiteribbon.org.nz