Cassidy has turned his life to religion and helping the less fortunate, and in turn has made soulful worship music his niche. He says he sees The Voice as an opportunity to help further his goals and "really carry on the family legacy."
His famous grandma also participated in the interviews, and opened up about her initial hesitation about having her grandson follow in the family's footsteps.
"In the beginning, I was not very happy with him going into show business," Jones admitted. "But, when I saw him sit down at a piano, I didn't even know he could play the piano. Then he started to sing, and I thought, 'You know what? This is a voice that's really remarkable.'"
For Cassidy, the biggest appeal of The Voice's blind auditions is anonymity, and getting the chance to prove his talent without the specter of the Cassidy name influencing anyone's decisions.
"I love that the coaches don't my name, they don't know anything about me," he said. "They're just judging me purely on the merit of my voice."
The young singer then took to the stage, where he performed Joan Osborne's 1995 hit "One of Us," while also playing the piano.
It took a minute for the judges to appreciate his vocal skills, but Adam Levine and Alicia Keys both turned their chairs -- and Keys couldn't have been more excited to see that Cassidy was playing the keyboard.