Demi Lovato received some sad news over the weekend. Patrick Lovato, her biological father, passed away. When Demi's older sister Dallas tweeted "Rest in peace daddy I love you" and Demi's mom, Dianna, posted a picture of the two girls with their father, the Twitter community responded with tweets of support. Though Demi and her father weren't close, she was obviously still very sad about his passing. Our thoughts and condolences go out to all of them.