Bosses of a toy manufacturer licensed to make a doll of Lady Gaga have filed a lawsuit against the star.

The Bad Romance hitmaker and her management and licensing companies are being sued for $10 million by executives at MGA Entertainment for an alleged breach of contract, according to the New York Daily News.

It is claimed Gaga requested the removal of a voice sound chip from the doll which put the company under pressure to meet their deadline for retailers.

Company bosses had hoped to ship the figure to shops in time for Christmas (12) but they allege the singer and her team "engaged in intentional and deliberate delays" to stop the toy reaching shelves until 2013, so it coincides with the release of her new album and perfume.

Chiefs at MGA Entertainment paid Gaga's licensing company Bravado International Group a $1 million advance but they are now petitioning to release the doll as soon as possible.

A spokesman for the pop star tells the New York Daily News, "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."