Tennis star Anna Kournikova is leaving NBC's 'The Biggest Loser' after one season, according to the Hollywood Reporter.

Kournikova joined the reality show as a trainer for Season 12, serving alongside long-time trainer Bob Harper. She was hired as a replacement for Jillian Michaels.

There have been rumors of Kournikova clashing with the staff behind the scenes and THR also reports contestants found her coaching to be too "brash."

At least one contestant took to Kournikova's coaching skills. After leaving the NBC series, contestant Joe Mitchell told People that the trainer helped "fix" him.

Get ready to see more Chelsea Clinton on your TV.

Clinton has joined NBC News as a full-time special correspondent. She'll start work immediately.

Her first assignments will be part of Brian Williams' 'Rock Center' and 'NBC Nightly News' series "Making a Difference."

"People who imagine and implement solutions to challenges in their own lives, in their communities, in our country and in our world have always inspired me," Clinton said in a statement. "I hope telling stories through 'Making a Difference' -- as in my academic work and non-profit work -- will help me to live my grandmother's adage of 'Life is not about what happens to you, but about what you do with what happens to you.'"

Joy to Beliebers and their grandparents: The original pop star, Tony Bennett, will be showing Justin Bieber how it's done when they both perform at NBC's annual live Christmas tree-lighting ceremony, 'Christmas in Rockefeller Center' later this month.

The roster of big name performers announced by the network spans not only generations, but also genres, with singers Michael Bublé, Cee Lo Green, Faith Hill, Carole King, Katharine McPhee and 'The Voice' winner Javier Colon performing a mix of current hits and holiday classics.

NBC announced that the hour-long special on November 30 will be hosted by the 'Today Show's Al Roker and Savannah Guthrie and will -- natch -- also feature seasonal high-kickers, The Radio City Rockettes. Prior to the primetime telecast, WNBC and other NBC affiliates (check your local listings) will also air an additional live hour of the special.

Howard Stern is reportedly in talks with NBC to join 'America's Got Talent.' He'd be filling the judge seat Piers Morgan recently vacated.

According to the Wall Street Journal, Stern could earn $15 million if he joins the show opposite Howie Mandel and Sharon Osbourne.

WSJ reports the show could move venues from Los Angeles to New York to accommodate Stern. That would cost an additional $10 million for the production.

Jeff Probst's syndicated talk show is a-go at NBC.

According to Deadline, NBC owned stations in New York, Los Angeles, Hartford, Philadelphia, Dallas-Fort Worth, San Francisco and San Diego will air the 'Survivor' host's new talk show. His daytime series will simply be titled 'Jeff Probst.'

"I'm fascinated with people," Probst said. "And I love adventure. I can't wait to bring these two worlds together in daytime, and the added bonus is I get to continue with 'Survivor' in primetime."

"This is 'The Voice'" ... Season 2 trailer.

NBC's top show is back this February and so are the trademark swivel chairs and blind auditions.

Starting Sun., Feb. 5 after the Super Bowl, Adam Levine, CeeLo Green, Blake Shelton and Christina Aguilera are all back for another season of tears, joy and high notes.

"You're just waiting on pins and needles for what those first few notes sound like," Aguilera says, describing the blind auditions.

Frankly, we can't wait. This season host Carson Daly will be joined by Christina Milian as social media correspondent.

Watch the new trailer below.

Piers Morgan has announced that he's quitting 'America's Got Talent' in order to concentrate on his CNN show. Morgan -- who's one of the original judges on the NBC show -- Tweeted "I'm leaving America's Got Talent after 6 wonderful years. Turned out that juggling's harder than it looks, so I'm going to focus on CNN." He then confirmed the news on 'Piers Morgan Tonight,' joking that he's also now available to host the Oscars.

He went on, "Big thanks to NBC, Fremantle, and of course, my friend Simon Cowell, for giving me such a great opportunity. It's been a blast." He also congratulated his colleagues on the show -- Sharon Osbourne, Howie Mandel and Nick Cannon: "You don't have to put up with me any more!"

Nick Jonas is a deadbeat dad ... on 'Last Man Standing.'

According to TVLine, Jonas will play Ryan, the absentee father of Mike Baxter's (Tim Allen) grandson. Jonas will appear in the Christmas-themed episode of the ABC comedy.

Jonas popped up on Matthew Perry's 'Mr. Sunshine' and recently filmed a guest appearance for NBC's midseason musical drama, 'Smash.'

He'll be appearing in 'How to Succeed in Business Without Really Trying' on Broadway starting this winter.

In other casting news ...

The new arrivals to 'Law & Order: SVU' are getting some action on the job -- of the guns-blazing variety, naturally.

In this exclusive video preview of 'Russian Brides' (Wed., Nov. 9, 10PM ET on NBC), Kelli Giddish and Danny Pino talk about what it's like to draw their TV guns on a perp.

"For 'Russian Brides,' you get to see me shoot a dude," Giddish said. "We're at an outdoor cafe, we're hoping the bad guy shows up ... and he does and I get to shoot him. That was really fun in the midst of the rain and all that."

What, did you expect a TV cop to have any remorse for mowing down an extra in the line of duty? Watch the video below for more scoop from Giddish and Pino.

A St. Louis-based production team has filed suit against 'Saturday Night Live' star Andy Samberg, NBC Universal, Universal Republic Records and Lonely Island over two sketches they claim to have had a hand in creating.

According to the Hollywood Reporter, Aleric Banks and Monique Hines said they created the music that formed the basis for 'SNL' skits 'Shy Ronnie' and 'Like a Boss.'

The duo, who go by the name StarStrukk Productions, said they had a connection to Samberg and submitted music prior to the release of the first Lonely Island album. The tracks were reportedly used with Lonely Island adding lyrics over the copyrighted master recordings.

The latest Superman actor, Henry Cavill, may have wound up playing a couple of very different pop culture icons had the stars aligned differently. On 'The Tonight Show' (Weeknights, 11:35PM ET on NBC), Jay Leno asked him about rumors that he was nearly cast as one of pop culture's oldest roles, and one of its newest.

Cavill confirmed that for his understanding, the role of James Bond was narrowed down to him and Daniel Craig. On the other end of the spectrum, it was his impression that Stephenie Meyer wanted him for Edward, but by the time they got around to making the movies he'd gotten too old.

After challenging the groups with hip-hop, 'The Sing-Off' (Mon., 8PM ET on NBC) threw them a double-whammy this week by having them tackle one song in the classic rock genre and another in country. It was a challenge that would truly show who could be the most versatile.

!!SPOILER ALERT!!

Urban Method was probably the group most people were immediately concerned about, as neither genre suits their sensibilities. In fact, they even added a rap to their rock track, 'Here I Go Again,' which was a little odd.

Descendants of the Brothers Grimm might be sworn enemies of all manner of supernatural creatures, but occasionally, said creatures can be persuaded to make themselves useful, as Monroe demonstrated on last week's 'Grimm' (Fri., 9PM ET on NBC).

While Nick was working a case, he asked his semi-friendly Blutbad pal Monroe to protect his injured aunt in the hospital, and while a little antagonistic posturing did occur, eventually, Monroe figured out that he had bigger fish to fry -- and an arm or two to tear off.

Who needs a guard dog?

Now that our tears have dried and the period of national mourning is over, we should all be able to laugh about Kim Kardashian's impending divorce -- after all, it doesn't seem to be depressing the Kardashian clan too much, on their various promotional tours.

Naturally, with their fingers on the pulse of our collective emotions, the cast of 'Saturday Night Live' (Sat., 11.30PM ET on NBC) felt that this weekend was the perfect time to introduce us to the latest Kardashian special: 'Kim's Fairytale Divorce,' coming soon to E!

"Whoopsies, I got divoooorced!" Nasim Pedrad cooed in a fairly eerie impersonation of America's favorite soon-to-be-divorcée.

'Parks and Recreation' is hitting the road for a new web series, and you're coming along!

Below, you can watch all four episodes of Andy (Chris Pratt) and April's (Aubrey Plaza) road trip to the Grand Canyon.

The first episode deals with April's fear of spiders, or as Andy calls it, "that arachno-cornocopia thing." The second installment sends the duo to the "Four Corners." When you watch, you'll see why that's in quotes. In episode 3, Leslie Knope calls and in episode 4 Andy and April discuss building a home ... next door to the Grand Canyon.