A former assistant of Lady Gaga has signed a $1 million `tell-all' book deal.

According to New York Post, Jennifer O'Neill has struck a publishing deal with Simon & Schuster and is currently writing a book entitled Fame Monster. The release date of the book remains unconfirmed. 

O'Neill is an ex-employee of the pop star who accused the singer of overworking her and making unnecessary demands on her time.  

In 2012 she sued Gaga in Manhattan's Federal Court for $393,000 in unpaid wages for owed her overtime. 

Lady Gaga was quoted as describing the former assistant as "a 'f***ing hood rat who is suing me for money that she didn't earn."