Blake Shelton is leaving 'The Voice,' and Niall Horan discusses working with the 'champion' country star.

Blake Shelton's career in country music is coming to an end. After 23 seasons on NBC's "The Voice," Shelton, 46, is prepared to leave the singing competition show. 

In an interview with Fox News Digital, first-time coach Niall Horan and previous Team Blake winners discussed the impact the "God's Country" singer had on their lives. 

"It was incredible to watch all of the tributes to Blake... "It was incredible to be a part of it, even his entire last season," Horan added. 

"I'm overjoyed for Blake. He retires as the major champion after 23 seasons."

While Shelton's final concert occurred on Tuesday, former Team Blake victors regrouped to celebrate the country music star's success one last time.

"It's so special, I mean, he changed all of our lives," Cassadee Pope exclaimed about the coach. 

"He's the reason I'm here, and just to send him go and honor him in this way... It's simply amazing to be a part of. "I'm simply honored to be here."

Other "The Voice" alums, like as season 4 champion Danielle Bradbery, said Shelton was a fantastic mentor and a "huge help" in their music careers.