"I was literally at the end of a road, you know, and coming to a place in my life where I was like, 'Am I going to keep doing this and feeling like I'm not getting anywhere? Or am I going to give this another shot?' And thank God, thank God, I was able to give it another shot," she said.
Chin's coach, Maroon 5 frontman Adam Levine, was also thankful to add a second win to his resume.
"I like to win. This is fun," Levine said after the show.
Javier Colon, mentored by Levine in season one, was crowned the winner in 2011. Fellow coach and country star Blake Shelton then reigned supreme for the next three seasons.
Levine said he had to change his approach in order to break Shelton's streak — a feat he ranked No. 1 on his list of life achievements.