judge Demi Lovato
's estranged father Patrick Lovato
died suddenly over the weekend, causing the singer to abruptly cancel a planned photo shoot.
In 2009 the Disney star revealed that she had not seen her biological father in a few years, "I had to cut off all connection. It was hurting me too much."
Her dad reached out to Radar Online on several occasions to expressed his sadness over the lost relationship with Demi.
Suffering from throat cancer and facing surgery last year, Patrick Lovato left this message on the entertainment website, “I want Demi to know that I would do anything in the world for my little girl, I just want to hear her voice, Demi, please call your daddy!”
Demi's older sister Dallas Lovato, 25, posted a message yesterday morning on Twitter:
Their mother Dianna De La Garza also hit Twitter to share a photo of her daughters during happier times with their dad:
On Father's Day, Demi tweeted a shout-out to her step-father Eddie De La Garza, "I hate calling @redraider30 my "step dad" because he has literally been the greatest dad a girl could ever hope for."
Demi's 11-year-old half sister, Madison De La Garza, is a child actress who had a co-starring role on 'Desperate Housewives,' playing the daughter of Eva Longoria's character.
Lovato's X Factor boss Simon Cowell also tweeted his condolences, “My thoughts are with you Demi. X”
Photo Credit: WENN