Taylor Swift will join Blake Shelton, Adam Levine, Pharrell Williams and Gwen Stefani as "The Voice" coaches. NBC has officially announced the "Shake It Off" hit maker will serve as the sole mentor for all the teams' contestants, E! Online reported.

As her fifth album "1989" drops on Oct. 27, Monday, Swift will make her first appearance on the seventh season of "The Voice." She will appear again on Oct. 28 and Nov. 3, when the Knockout Rounds are near.  

"Shake It Off," the lead single of "1989," peaked at number one on Billboard Hot 100 but is currently pushed down to number two by Meghan Trainor's "All About That Bass."

Swift told the contestants that "tailoring songs to fit their personalities and strengths" is important during her appearance on the show as she advised them on vocal technique and stage presence.

Meanwhile, country singer Shelton's ninth studio album "Bringing Back the Sunshine" with the lead single "Just South of Heaven" is already available, KTIC reported.

When he appeared on "Live with Kelly and Michael," Shelton said, "We've taken years to make an album before and I think this one we made in just, I don't know, maybe six months or something."

"It was just like, 'Man, let's make the record and keep doing the show,'" Shelton said about "Bringing Back the Sunshine" and "The Voice." "I'm having fun. God, who wouldn't love to do this?"

Shelton also admitted he found new "The Voice" coach Stefani "very intimidating."

"She's this rock icon, and she's just, I don't know, there's just this presence about her. But she's the most normal person probably in Hollywood," he explained.

During his recent appearance on "Today," Shelton also talked about Stefani.

"I had never met Gwen, and I didn't know anybody that knew her, either," Shelton told Today's hosts Hoda Kotb and Kathie Lee Gifford. "I was like, 'Oh, my gosh. She's gonna be, like, a freak or something.'"

On the other hand, Shelton reiterated Stefani is "the most normal person" he has met in Hollywood yet and described Williams as "a really nice guy."

Airing on NBC Mondays and Tuesdays at 8 p.m., "The Voice Season 7" has 13.2 million viewers in live plus same day ratings and an average of 4.0 rating in the 18-49 demographic.