Singer and US X Factor judge, Demi Lovato, has cancelled an appearance for the talent show following the death of her father, Patrick Lovato.

The sad news was confirmed in a tweet by the singer’s sister, Dallas, who wrote: "Rest in peace daddy I love you.”

No further details about Patrick Lovato’s death are known, although it has been reported that he has been battling cancer in recent year. Lovato's parents divorced in 1994 and she has been estranged from her dad since 2007.

After news of Patrick's death broke, Demi's mother Dianna, tweeted a picture of him with the singer and her sister with the caption: "Thank you all for the outpouring of love and prayers. Y'all are amazing!"