Something about TV singing shows tends to bring out the worst in human nature: put-downs, feuds and back-stabbing. But enough about the producers. At least the contestants are usually polite to each other. American Idol, which recently rolled out its 11th season, will face a newly competitive landscape. Idol returns mere weeks after The X Factor, the spawn of ex-Idol judge Simon Cowell, wrapped up its inaugural run on Fox. And NBC will give the second season of its singing contest The Voice a huge push with a post-Super Bowl premiere early next month. The pile up has made for some sharp elbows among the people who put on vocal elimination contests, which have become critical to the American TV business. Every broadcast network is now either reliant on a high-rated singing show, or trying to figure out how to counter programme against one. And that\'s not counting NBC\'s variety-oriented America\'s Got Talent plus dance franchises such as ABC\'s Dancing With the Stars. \"We kind of invented this whole game that everybody is now copying,\" Randy Jackson told reporters last week. (The only original judge left on Idol, he will be joined again this season by Aerosmith frontman Steven Tyler and pop diva Jennifer Lopez.) Jackson added that although X Factor managed decent ratings for Cowell, it probably did not deliver on \"the expectations he wanted\". In an interview with The Times last month, meanwhile, X Factor impresario Cowell looked askance at the kinder, gentler approach favoured by Idol after he left the show at the end of Season 9. \"To me, they\'re like The Waltons: popular, harmless, a lot of people like it,\" he said of Idol. \"And maybe we\'re like Dallas,\" referring to the over-the-top 1980s soap of Texas barons behaving badly. Bragging Of course, the larger question isn\'t which show claims this or that bragging right, but rather how long this particular programming craze will last. Television tends to run in observable cycles, and the fortunes of networks rise and fall on getting in and out at the right time. A decade ago, ABC became the No 1 network with Who Wants to Be a Millionaire, only to fizzle fast when it overplayed the show and the quiz-show boom receded. But for the moment, the singing genre rules TV. And that has made for some fierce behind-the-scenes battles among the folks who create the shows. Cowell has been engaged in a long-running feud with Simon Fuller, creator of the British series Pop Idol, which was adapted into American Idol. Fuller sued Cowell after the latter created the UK version of X Factor, which became a hit. The pair eventually arranged a settlement that entailed Fuller\'s getting an executive producer credit on the British Factor. But when Factor came to the US last year, Fuller sued again. Cowell has this time publicly scoffed at his former friend\'s demand for credit. That history helps explain why relations between Idol and Factor aren\'t exactly warm, despite airing on the same network. Cowell says he has a plan to keep Factor competitive by changing the show, but he declined to discuss those changes until his rivals have already premiered. \"What we\'re gonna do is different,\" he promised. Meanwhile, NBC has had to step carefully with The Voice, which like Factor uses established pop stars in dual roles as judges and mentors. Cowell is the executive producer of America\'s Got Talent, the top-rated show that is crucial to NBC\'s summer prospects, so the network\'s executives were eager to avoid offending him, giving him a heads-up before they proceeded. The Voice peaked with a solid 14.4 million total viewers last May, but eroded a bit as the show headed toward its late June finale. Paul Telegdy, NBC\'s president of alternative and late-night programming, said that this time around, in response to viewer feedback, the show will spend more time telling the contestants\' stories. The show\'s performance is especially crucial to NBC because virtually its entire new fall slate got hammered in the ratings. \"We\'re doing an awful lot to ensure that it\'s creatively invigorated,\" Telegdy said. Another point of differentiation, he added: The Voice doesn\'t use the audio \"sweeteners\" and other tricks that Factor and Idol have at times openly used, especially for group performances. Idol is returning in a powerful position. It\'s been TV\'s top show since 2006. And last season— the first without Cowell — the show\'s ratings went up for the first time in years. Even so, the makers of Idol aren\'t taking any chances in an ultra-competitive marketplace. Last week, executive producer Ken Warwick told reporters that Idol still had the best record of producing bona fide recording stars, such as Carrie Underwood and Kelly Clarkson. Jackson could not resist piling on. \"The winner of The Voice, as I will remind you, was an artist that had a deal at Capitol Records for many years, a failed contract over there,\" the Idol judge said. \"That show, it was almost like second-chance people.\"