How do you top signing Nick Jonas as a celebrity mentor? L.A. Reid has now shown rival judge Demi Lovato exactly how. According to TMZ. he nabbed Justin Bieber for the upcoming season of "The X Factor."

Bing: More about Justin Bieber | 'The X Factor'

The 18-year-old pop superstar was photographed by paparazzi on the deck of a Hollywood Hills home Monday, alongside Reid, dishing out advice to contestants who looked way older than him. They were apparently filming the "judges' houses" phase of the competition, in which the season's top 32 acts are whittled down to the 16 who will compete in the show's live episodes, which air in October.

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It's not clear how rival judges Simon Cowell and Britney Spears hope to out-celebrity this mentor. But it's a good bet that the voicemail for Lady Gaga's agent is now full. (As we reported Tuesday morning, Jonas has signed on to mentor Lovato's crew.)

Season 2 of "The X Factor" premeires Wednesday, Sept. 12, at 8 p.m. ET/PT on Fox.

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"The X Factor" mentor Demi Lovato has recruited close friend Nick Jonas to join her for the judge's house round in the upcoming season. The Jonas Brother may still be in the running to become a judge for rival singing competition, "American Idol," but in the meantime, he's signed on to guest star on "The X Factor" to flex his judging muscles before "Idol" producers make a final decision.

Bing: More about Nick Jonas | 'American Idol'

The Hollywood Reporter reports that Jonas will be joining Lovato at her home when she chooses four of the acts she mentored to go on and compete against the top 16 contestants. On Monday, Aug. 27, it was revealed that Lovato will be mentoring solo singers aged 12 to 16, which will definitely be a bonus for both her and Jonas, as they both started their careers at a young age.

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The two have known each other since 2007, when she starred alongside him and his brothers in the Disney Channel movie "Camp Rock." The movie catapulted the singers to fame, which led to a sequel. Incidentally, Lovato also dated his brother, Joe Jonas, in 2010. Season 2 of "The X Factor" begins Wednesday, Sept. 12, at 8 p.m. ET/PT on FOX.

Season 2 of "The X Factor" begins Wednesday, Sept. 12, at 8 p.m. ET/PT on FOX.

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"America's Got Talent" judge Howard Stern has revealed that NBC executives have ordered him to cease bad-mouthing his fellow network star Jay Leno, after cutting comments Stern made on his radio show last Monday, Aug. 21. During the shock jock's XM radio show last week, he mocked the "Tonight Show" host for announcing that he had to fire 20 people from his staff, and personally took a salary cut to avoid more layoffs.

Bing: More about Howard Stern | 'America's Got Talent'

In the rant, Stern called Leno a "spineless maggot," insisting that the comedian wanted to get rid of a handful of employees, but didn't have the guts to take the blame, and NBC execs agreed to take the fall for him. After his harsh remarks, Stern revealed to listeners the next day that he got a call from his NBC bosses regarding his outrage at Leno. Stern divulged, "I got sort of a threatening kind of comment from one of the executives ... I said, 'Do not tell me to not talk about Jay Leno. I will f***ing talk about Jay Leno for four hours if you tell me not to.' I was done with Jay Leno, now I'm all fired up again. F*** Jay!"

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The situation holds even more weight because he is currently serving as a judge on NBC's hit summer show, "America's Got Talent." And as much as he has enjoyed his time on the show, he is easily willing to give up his post than keep quiet about his thoughts on Leno. He added, "I don't answer to anybody, everyone knows that. That's part of the game, and that's why I'm a great judge - I would tell people if they suck. I will tell anybody anything, but don't tell me anything ... Nobody cares what I think ... I don't care who I work for. "I love my job on 'AGT,' I love working for the people at NBC, they've been nothing but wonderful, But please don't tell me what to say. I'd rather leave than not talk about Jay Leno. I don't care ... Fire me too."

"America's Got Talent" airs Tuesdays at 8 p.m. ET/PT and Wednesdays at 9 p.m. ET/PT on NBC.

Reality TV doesn't need a defender but Kim Kardashian is more than willing to take the job.

The 31-year-old starlet, who acknowledges that she is famous for being famous, recently told V Magazine reality TV is entertaining and a part of the culture.

Bing: More on 'Keeping Up with the Kardashians' | Kim Kardashian

"I don't take offense to it at all," said Kardashian in response to criticism from the likes of Jon Hamm and Jeremy Renner. "I'm not naïve to the fact that I'm not a singer or an actress or anything like that. I've never claimed to be anything that I'm not. I think (reality TV) is still a new form of entertainment that was kind of an unexpected thing."

Kardashian, who along with her family stars on "Keeping Up with the Kardashians" and a number of subsequent spinoffs also on E!, went on to compare reality TV to rap music. Kardashian is also not so secretly dating rapper and producer, Kanye West, 35.

"When rap music first came out, people were like, 'We don't understand this. What is this? It's just a fad,'" she said. "But rap music is definitely here to stay, and I think reality shows have proven they are as well."

Plus: Reality TV stars who drive us crazy | 'Survivor: Philippines'

Kardashian, who took to Twitter this weekend to show off her new blond highlights, her butt in a fresh pair of jeans and a huge gold ring that spells out "KimYe CRAY" (um, that's her and Kanye's name combined and "cray" is a slang word for crazy, in case you didn't know), said she'd also like to have a star on the Hollywood Walk of Fame someday.

"I think that it would be a huge achievement and a goal that anyone would want," she said.

"Keeping Up with the Kardashians" airs Sundays at 9 p.m. ET/PT on E!

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Keith Urban confirms "American Idol" bosses have asked him to join as a judge on the upcoming season of the hit singing competition. The country singer is among the many celebrities that have been rumored to be in talks with show producers about joining the panel, and Urban has finally confirmed that he is on the shortlist to replace Jennifer Lopez and Steven Tyler as a judge.

Bing: More about Keith Urban | 'American Idol'

Urban recently spoke on a radio show in his native Australia about a possible future on "Idol" but is waiting for the final decision, just like the rest of America. He reveals, "They did reach out to us. But they have been reaching out to a lot of people, so I think they are just figuring out which way they are going to go too." Urban is up against an impressive group of artists for the spot, including singer Nick Jonas, Season 8 runner-up Adam Lambert, and N.E.R.D. rapper Pharrell Williams.

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But whether or not he is offered the job, Urban assures that his main goal at the moment is his music. He adds, "All I can say right now is that I’m trying to make an album and it’s strange how these opportunities all come in one big fell swoop. But my priority right now is to just make a record and that really has to lead the charge for me." If hired, Urban will be joining confirmed judge Mariah Carey for the 12th season of "American Idol," due to begin in 2013.