"She's a wonderful person," Joe says of Katherine. "I think she's too easy with people. She's just like Michael. She's too easy."
Like his wife, Joe says he thinks about Michael every night.
Watch Katherine tell Oprah about the moment she and Joe realized their son was special.
"I just can't picture him gone," Joe says. "Every time I go into some place—a restaurant or a casino or something—his music is playing. ... It brings back memories because I remember the songs. I was at every recording session he ever did."