Gaga furious at Kim Kardashian for 'stealing her designer'

Pop sensation Lady Gaga is reportedly furious that reality star Kim Kardashian has stolen her designer.

While Gaga, 26, is convalescing following hip surgery, Kardashian apparently has been busy convincing Nicola Formichetti to work for her.

The pregnant star has bombarded Gaga's collaborator with emails and even took a last-minute flight from Miami to New York to meet up with him, reported Sun online.

The 'Poker Face' hitmaker, who was forced to axe the remainder of her Born This Way Ball tour after a case of joint inflammation condition synovitis left her unable to walk, has not taken well to Kardashian encroaching on her territory.
 

"Gaga was fuming when she discovered Nicola was working with Kim. She's fiercely protective of the people she works with and she's always been determined to have Nicola all to herself," said a source.