The coaches enlist iconic superstar Mariah Carey to serve as Key Advisor on the first night of Knockouts, when the coaches pair their artists to perform solo, then select just one of them to move on to the Playoffs.
| Creator | Roel van Velzen |
|---|---|
| Actor | Carson Daly, Adam Levine, Kelly Clarkson |
| Country | United States of America |
| Production | Warner Horizon Television |