The 30-year-old 'Starships' hitmaker has taken the step because she wants to take her career seriously now and present herself in the best possible way, reported Sun online.
"Nicki is desperate to be taken seriously as an artist. She has fired her long-standing hairdresser, who has been responsible for some of her crazy hairstyles over the years. She has also fired her stylist," a source said.
Minaj has been one of the judges at singing reality show 'American Idol'.
"Nicki feels that now she is done with 'American Idol'. She can finally be taken seriously and release a proper hip-hop album," the source added.