The 'Telephone' hitmaker is said to have become obsessed with the late pop artist - who died in 1987 aged 58 - and reportedly makes her decisions based on their imaginary conversations.
A source said: "She is convinced he is controlling her from beyond the grave, guiding her life and career. Her entire life has become dictated by these conversations."
Another insider claimed: "She says she is in touch with his spirit. She sits and talks to him for hours, as if he's in the room with her. She says he tells her what to wear."
The 24-year-old singer is so obsessed with the artist she has bought several of his works and is planning to throw a Warhol-themed party later this week, much to the bemusement of event planners.
A source told The Sun newspaper: "She has told the organisers that everything must be in the spirit of Warhol.
"They were a little confused at first but are doing their best to satisfy her demands. Her house is insane. She has spent thousands turning it into a shrine to Warhol.
"I wouldn't be surprised if she started dressing head to toe in his clothes and changed her name to Andy."
The highest price ever paid for a Warhol work was a staggering $100 million for his 1963 canvas 'Eight Elvises', and he is also famous for his prediction that in the future everyone would enjoy "15 minutes of fame".