Luke Bryan's infant niece, Sadie Brett, passed away. A representative Bryan confirmed her death to E! News. Sadie was diagnosed with an undisclosed disease which was affecting her liver. The baby also had heart issues. Brayn took to concours-twitter.htm">twitter to thak his fans for their love and support. He wrote: "We thank all of you for your prayers. Love y'all." This isn't the first tragedy for Bryan and his family. Back in 1996, the country star lost his 26 year old brother in a car accident.