Riley, 23, says he believes he wrote Taylor Swift's hit song "Shake it Off," among others. His family has come together to confront him and ask him hard questions about his drug and alcohol use and the many stories he's told about his famous songwriting career. 
 
Dr. Phil asks Riley what he believes is wrong with him. In the video above, Riley explains what he thinks is at the source of his drug and alcohol use. The 23-year-old's answer may surprise you!
 
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