Reality TV
ITV said in a statement today: "Sharon Osbourne has decided to leave The X Factor after four fantastic years.
"ITV thanks her for her immense contribution to the show and for all her humour, compassion and energy.
"She has been a tremendous judge and mentor on the programme but we respect her wish to leave and wish her the very best with her future projects."
The news follows rumours Osbourne was seeking a £500,000 pay rise to take part in the fifth series.
Show producers are now short of time to find a replacement judge for this summer's series, according to The Sun.
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