Blake Shelton's final season on — so it's only fitting that the Mega Mentor is a country music legend!NBC announced on Wednesday that Reba McEntire will serve as the Mega Mentor for the upcoming season 23, advising Shelton and his fellow coaches — Kelly Clarkson and newcomers Chance the Rapper and Niall Horan — and their team members ahead of the Knockout Rounds.It's a full-circle moment for McEntire, who served as Shelton's Battle Round Advisor during the singing competition's very first season back in 2011.Of course, Shelton isn't the only coach McEntire has a connection with — she's also very close with Clarkson, her former daughter-in-law and frequent duet partner.Season 23 will also see some changes to the competition, with the addition of a «Playoff Pass» in the Battle Rounds, which allows both artists to advance — and the winner to skip the Knockout Round and head straight to the Playoffs. Each coach will still have a steal in both the Battle and Knockout Rounds, and the return of the Playoff Round will see the top 20 artists going head-to-head to determine who will make it to the live shows.Season 23 premieres on March 6, with the Battle Rounds commencing on March 27, the Playoffs on May 1 and the live shows on May 15.McEntire previously revealed that she'd turned down an offer to become a coach on, explaining that she didn't want to be tied down to a long-term project when she has so much on her plate already.