Demi Lovato has cancelled her work commitments following the death of her father Patrick.
The details of his passing have not been released, but Demi's reps have confirmed the death. It is believed that he had been suffering from cancer.
The X Factor USA judge had been due to attend a press session with Simon Cowell, Kelly Rowland and Paulina Rubio but had to pull out.
And show host Mario Lopez tweeted a picture of the others with a message of sympathy, saying: "With my @TheXFactorUSA team! Missing @ddlovato today... :(."
Demi later thanked fans on Twitter for the support she had been shown.
She wrote: "I feel so humbled to have had so much support from my fans, friends, family and complete strangers.. God bless you all, thank you so much."