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— demetria lovato (@ddlovato) June 23, 2013
Lovato's older sister Dallas Lovato broke the news about their father's passing in a tweet on Saturday.
“Rest in peace daddy I love you,” she wrote.
In turn, the "Heart Attack" singer began receiving condolences and messages of support from her over 15 million followers and fellow entertainers.
“My thoughts are with you Demi. X,” tweeted her "X Factor" boss Simon Cowell.
According to Us Weekly, Lovato's father died of cancer. The details of where, how or when he died have not yet been revealed.