The ninth season of "The Voice" kicked off on Monday with a two-hour special that had the four judges covering each others' songs.

The second segment of the night saw the boys – Adam Levine, Blake Shelton and Pharrell Williams – welcoming Gwen Stefani with gifts, before all of them took to their chairs to start the blind auditions.

At the end of the first episode of the season, all four judges managed to convince contestants to join their respective teams. But only a few earned the four-chair turn.

Here is a list of contestants who managed to floor all the four judges.

Mark Hood opened season 9 of "The Voice", and the 24-year-old Chicago native managed to create quite a buzz with his rendition of Bill Withers' "Use Me."

Although all the four judges made passionate pitches to have him on their team, Hood finally decided to go with Team Pharrell.

Jordan Smith's rendition of Sia's "Chandelier" earned him a lot of praises from the four judges, with Levine even calling him "the most important person that's ever been on this show."

Shortly after Smith chose Levine as his mentor, the Maroon 5 singer said: "The world can learn a lot from Jordan. He was lifting every single person in the room and when I turned around and experienced it, I thought to myself, 'Wow, this kid is a wonderful human being and also a talented human being.' I love it when those things collide."

Barrett Baber, the 39-year-old high school drama teacher from Arkansas was the last four-chair turn of the day. He won over the judges with his rendition of The Jeff Healey Band's "Angel Eyes."

After his performance, Barrett told the judges he wants to "pioneer some new music" by "mixing country music with some soul." "There's some really great music out there, but I think there's a place for me for this voice," he says, and chooses Blake as his mentor.


Final standing:

Team Pharrell: Mark Hood, Siahna Im
Team Gwen: Kota Wade, Braiden Sunshine
Team Adam: Keith Semple and Jordan Smith
Team Blake: Nadjah Nicole and Barrett Baber

"The Voice" airs Mondays and Tuesdays on NBC. Click here to watch the episode live online.