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Camilla Storey claimed to the authorities that the 26-year-old singer was "screaming like a loon".
Storey feared for her safety after receiving the message, while Javine is reported to have attended a police station where she accepted a caution.
Their working partnership became strained when Javine's career slowed down following her Eurovision appearance in 2005.
Javine's rapper boyfriend MC Harvey, 29, was recently cautioned by police after allegedly threatening the singer with a knife after losing his temper.
