Live Nation, Sony, BMG Rights, KKR and Bertelsmann were also said to be in the mix.
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Diller, who stepped down as Live Nation chairman in September, couldn't be reached for comment.
The company, now a part of Live Nation, the world's largest concert promoter, declined comment.
Live Nation Entertainment (LYV) reports its fourth quarter earnings on Tuesday, February 26, 2013.
Most analysts think investors should stand pat on Live Nation, with two of three analysts rating it hold.
Analysts generally think investors should stand pat on Live Nation, with two of three analysts rating it hold.
According to Westminster Council, Live Nation took the decision to end the concert "to comply with their licence".
After arch-rival Live Nation bought Ticketmaster in 2010, AEG moved to build its own ticketing service, now called AXS Ticketing.
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Live Nation later issued a statement saying it was "unfortunate" the performance had been "stopped right at the very end".
Putting your content through your own buildings "is not rocket science, but Live Nation doesn't do it that way, " says Leiweke.
Live Nation has brought the likes of Paul Simon, Madonna, Rihanna and Live 8 to Hyde Park over the past decade.
Live Nation may pull out of staging concerts in Hyde Park in London because of a dispute over the tender process.
Live Nation was responsible for 25 days of events at the central London venue as part of the London 2012 Festival.
The organisers Live Nation and Magic 105.4 have booked Bryan Adams and Jamiroquai to headline and hope to attract 25, 000 people each day.
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Both Spectacor and AEG are developing their own new ticketing businesses to better compete with Ticketmaster, which was recently merged into Live Nation.
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Mason notes that they have signed a deal with Live Nation: he said it is a new category of daily deals, all around events.
Live Nation, for example, talked about including maps of stadium layouts in the printing of tickets, while Yahoo suggested a daily personalized news service.
Along with Live Nation, Jay-Z also appears to be taking on more downside risk, which he can afford more easily than the former NSYNC star.
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But the Justice Department put a damper on the value of that relationship last year with the conditions it attached to the Live Nation-Ticketmaster merger.
The deal ends the link between The Royal Parks and Live Nation, which brought the likes of Madonna, Rihanna and Live 8 to Hyde Park.
Some in the concert industry have been concerned that the Live Nation-Ticketmaster merger created an entity with power over too many facets of the multibillion-dollar concert business.
The product line commemorates the brand's partnership with Live Nation Entertainment and its sponsorship of the Klipsch Music Center amphitheater in its global headquarter city of Indianapolis.
"To stay on top in this economy, you've got to work a lot harder, " says Live Nation Comedy President Geof Wills of a business he calls Darwinian.
Jay-Z released an album every year from 1996-2003 before taking a job as president of Def Jam and then founding Roc Nation, a joint venture with Live Nation.
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Live Nation Global Touring said in a news release Wednesday that Lady Gaga has a tear in her right hip that will require surgery, followed by a recovery period.
Bernstein analyst Jeffrey Lindsay said Ticketmaster is going to be something to watch because it is losing about 14.0% of its business wit the end of its contract with Live Nation.
Though he left Def Jam in 2007 and a year later launched Roc Nation, a joint-venture label with concert promoter Live Nation, his Def Jam masters are scheduled to revert to him in 2014.
The event will be produced by Live Nation.
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In arguing in support of their merger, executives of Live Nation and Ticketmaster maintained that they have limited influence on the cost of concert tickets, which is ultimately dictated by the financial demands of performers.
Lindsay said Ticketmaster is going to be something to watch because it is losing about 14.0% of its business as it loses the Live Nation (nyse: LYV - news - people ) contract.
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