MGA Entertainment, the makers of the Bratz range, has accused GaGa of deliberately putting back the launch of the product to tie in with her next studio album in 2013.
"MGA faces irreparable harm at the hands of world famous artist and icon Lady GaGa, her worldwide management company, Atom Factory, and her licensee, Bravado [the merchandising arm of Universal Music]," the legal filing read.
GaGa, her management and licensing company are accused of conspiring to withhold "final" or "official" approvals of the GaGa dolls to prevent the agreed shipment date of summer 2012, preventing their release ahead of the Christmas shopping season.
Amanda Silverman, a spokeswoman for Lady GaGa, told Bloomberg: "This is a dispute between Universal Music Group's merchandising company and MGA.
"There was no legitimate reason for dragging Lady GaGa into that dispute. Lady GaGa will vigorously defend MGA's ill-conceived lawsuit and is confident that she will prevail.
"There was no legitimate reason for dragging Lady GaGa into that dispute."
Bravado International Group spokesman Peter Lofumento added: "We will vigorously defend ourselves in court."
The two sides are due to meet in court on August 29 and Silverman said that GaGa would ask the judge to dismiss the lawsuit.
MGA claims that Bravado has breached the agreement and breached the implied covenant of good faith and fair dealing, while GaGa and Atom have interfered with the agreement.
The Bratz company argues that it is entitled to declaratory judgements and specific performance.