A mole told The Wrap that former panelist Christina - who left the show in 2012 after three seasons to promote her latest album LOTUS - is expected to return this autumn after signing a deal worth a rumored $17 million.
It is as yet unclear whether Cee Lo Green, who also departed last year, will be returning alongside Christina or whether his popular replacement, Usher, will stay on.
The current line-up of NBC's singing competition, which also features Adam Levine and Blake Shelton, has proved a hit with audiences and ratings are at an all-time high. Producer Matt Burnett confirmed Shakira's departure and explained change was a natural progress when working with successful recording artists: "Everybody can't coach for life because when you have people with current recording in the game, this is not their job. Their job is their fans and making music and being live, and so we knew from the beginning that this would happen, and we've had six coaches. They all have another life and their schedules."
Adam Levine will make his Saturday Night Live hosting debut on January 26.
While the Voice judge and Maroon 5 frontman will host for the first time ever in the episode which will feature musical guest Kendrick Lamar, he has previously appeared in a digital short on the comedy sketch show with Andy Samberg and Fred Armisen.
Adam's appearance will take place once week after Silver Linings Playbook star Jennifer Lawrence makes her SNL debut on January 19 with a performance from The Lumineers.
Adam recently revealed he will miss Christina Aguilera and Cee Lo Green on The Voice as they take a season off to focus on their respective music careers but admitted he is excited about their replacements Usher and Shakira: "Christina and Cee Lo are so close to my heart because we went through the show becoming a success together and Usher and Shakira are coming into it as a big institution. So it's different but it still feels good because they are legitimate artists. I knew Usher before. We've worked in the studio a couple of times together. Shakira is a new friend but I love her dearly already. She's so sweet and adorable and hilarious."
Ricky Martin has no plans to reveal his nasty side on The Voice Australia.
The "Livin' La Vida Loca" singer - who is set to finish his stint performing in Evita on Broadway on January 26 - has signed on to judge the second series of the show but the Grammy winner said he won't be the show's version of Simon Cowell.
The 40-year-old star told the Huffington Post, "I don't believe in tough love. I believe in love, and I believe in being nurturing to new talented men and women."
Ricky is heavily involved in the development of a new dramedy series tackling social issues with a sense of humor for NBC that he will produce, write and star in. The series is expected to hit screens next year.
"It's about growing. It's a moment in my life where I just need to absorb and be surrounded by amazing actors and musicians and grow as an entertainer. I think this is going to be an amazing year for that," he said.
Dolly Parton has turned down American Idol and The X Factor. The legendary singer was approached to join both shows as a judge over the years but admitted the only TV talent search she would ever consider appearing on is The Voice because it is more nurturing to its contestants.
"I've been asked to do American Idol and The X Factor almost every time there's a new season. [On The Voice] you don't have to judge that much and I hesitate to judge people," she said.
Dolly previously revealed she will always be grateful to Whitney Houston for making her song "I Will Always Love You" famous and credits her friends and God with preventing her from going down the same road as the tragic singer, who drowned following an accidental overdose in a hotel bathtub in February: "I thank God every day for that song - and Whitney made it popular worldwide. It's a very simple song, really, as simple as anything I've ever written. I've always had good and close friends, and a spiritual faith. God will take the wrong people and things out, and teach me to have the right people and the right things. Some people don't have that, and that's where it can go wrong."
Adam Levine is terrified of Shakira.
The Maroon 5 singer will be joined on The Voice by the singer and Usher next season when they replace Cee Lo Green and Christina Aguilera, but he has no plans to subject her to any initiation ceremonies because he knows the pregnant star is more than a match for him.
"[Fellow coach] Blake Shelton and I don't have it in our hearts to do anything terrible and I know Shakira, she could knock me out," he said.
While he is excited about working with Shakira, Adam will miss Christina, despite their bickering on the show: "We never hated each other. It was just silly bickering, like brother and sister. That's in the past, I'll miss her next season."
Usher can't wait to "nourish talent" on The Voice.
The "OMG" hitmaker and Shakira will join the panel of the singing competition next season as replacements for Christina Aguilera and Cee Lo Green and Usher - who famously mentored Justin Bieber - is excited about discovering new stars and guiding their careers.
"This is an opportunity for me to allow [audiences] into the world and into that process of [artist development]... it kind of gives credence to what artist development is truly all about and [The Voice]. I think, is really sustaining the artists of the future. The point is, being a part of The Voice gives me that opportunity to not only spot talent but nourish it and also allow the world to be a part of that process."
Usher is also excited that the competition isn't concerned with how its contestants look but instead judges them on their talent. "The cool part about The Voice is that it starts with the voice and obviously it's going to end with the voice. If you make an incredible record, it lasts forever," he added.
Christina Aguilera and Adam Levine love to prank their fellow The Voice coaches. The "Your Body" singer recently announced she will take a break from the show next season in order to focus on her new album and Christina admitted leaving will be "bittersweet" because she has so much fun with her fellow mentors.
"It's bittersweet. I so enjoy being a coach to my team on The Voice [and] and at this point in season three, all of us coaches have truly bonded. When me and Adam are on breaks backstage, you know, we're writing profanity with my red lipstick all over Blake [Shelton]'s trailer while he's napping inside. It's like we have definitely become like brother and sister. We goof around and play around. I'm going to miss it," she told E! News.
Usher and Shakira are set to replace Christina Aguilera and Cee Lo Green on The Voice. The pair were recruited to join the fourth season of the singing show after Christina decided to leave to spend time touring and promoting her new album Lotus while Cee Lo is working with NBC on a new show of his own. However, they will both return for season five.
"Doing two back-to-back cycles of this show requires a tremendous amount of time, and we are happy to accommodate the commitments made by Christina and Cee Lo. The participants on our show benefit from our coaches' expertise and their continued success in the music business allows for significant new contributions to the contestants when they return," said chairman of NBC Entertainment Robert Greenblatt.
Christina Aguilera thinks that Britney Spears will be a "great" X Factor judge.
The "Fighter" hitmaker - who is also a coach on singing contest The Voice - wishes her former All-New Mickey Mouse Club co-star well in her new role on the rival talent search show. "I came up with Britney. Mickey Mouse Club, we were very close. Our paths have always crossed and they continue to cross. I welcome her to this family of fun and entertainment and finding new talent. I don't know what she's going to offer specifically, but I know she's a pro and she's going to give, I think, great advice."
Pink turned down roles judging The X Factor, American Idol and The Voice.
The outspoken 32-year-old singer said she refused to take part in the reality TV shows since "you can't be honest" and thought the public would hate her if she voiced her true feelings because there is only room for one "Mr Nasty."
"I was offered The Voice in Australia plus American Idol and The X Factor. I said no because you can't be honest.'' People will hate you if you're honest. Simon Cowell is the only person who gets away with it because he's got an accent. And he's a man."
The "So What" hitmaker - who has 14-month-old daughter Willow with her husband Carey Grant - has also revealed that being a mother is proving far more emotional than she expected and confessed she cries "daily." She told Entertainment Tonight that she likes Carey to take the blame for their parenting mistakes, joking, "I'm a perfectionist, I cry daily! I'm glad though that the two things that have gone wrong were Dad's fault. The first time anything bad happened he was like, 'Oh, I'm so glad it was me!' I'm like, 'Me too! I'm going to cry anyway though.'"
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