Susan Boyle threw a tantrum when her private jet was delayed for two hours.
The singer lashed out on her niece—who works are her assistant, calling her “a bitch.”
Passengers watched as the 49-year-old argued with Joanna Crawford during her flight home.
The two exchanged angry words, but sources say that the conflict occurred because Boyle was tied and emotional. They were coming from a 13-hour flight from Tokyo, where she performed.
Crawford was hired to organize the singer’s travel schedule. She is the daughter of Boyle’s sister.
Reports claim that the relationship between Boyle and Crawford have been strained for months.