Fans and fellow country music stars, including Blake Shelton, Toby Keith and Charlie Daniels, paid tribute to Conley on Twitter.
"My heart is absolutely destroyed today ... I'm sad to report that Earl Thomas Conley passed away very early this morning," Shelton tweeted. "Earl was my all time favorite singer, hero and my friend. Prayers to his family. We will all miss you deeply my brother. Now go rest ..."
>> See Shelton's tweet here
"An all time great," wrote Keith. "Earl Thomas Conley passed away today. Huge influence on me. Loved him. Prayers to his family."
>> See his post here
Daniels called Conley a "great country singer."
"Rest in peace," he added.
>> See the tweet here
Read more here.