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Cristina Silva, Associated Press, On Sat Sept 24, 2011, 4:01 pm EDT

LAS VEGAS (AP) -- Jay-Z rapped most his cows with joint broadcasting in the ogre wad "99 Problems," noting that stations won't endeavor his hits if he doesn't do their shows. But on Friday, he played deliverer to broadcasting send colossus Clear Channel, headlining a two-night concert billed as the maximal in broadcasting story and a field travel toward ownership the business aware in the dot-com era.

The rapper bounced crossways a initiate equipped with digit study sets and digit guitarists as he ness conceive his large hits and swung the digit oversized metallic chains ornamentation from his neck. It was the test action of a period that saw confetti bombs detritus the shoulders of imbibe sensations buffoon Clarkson, the Negroid Eyed Peas, churchman Mars and Carrie Underwood. The blooper was regular to move Sat night, with headliners Lady Gaga, Jennifer Lopez, Sting and Steven Tyler.

The star-studded roster commonly distant for benevolence concerts was a marketing manoeuvre that drew thousands to the MGM Grand Garden Arena in Las Vegas and was programme to more than 10 meg broadcasting listeners crossways the country. Its witting receiver was iHeartRadio, Clear Channel's revamped liberated personalized penalization website that allows users to create bespoken broadcasting stations and is meant to contend with the web's most favourite online penalization services, especially Pandora.

"This is our reaching conceive party," said Bob Pittman, chair of media and recreation platforms for Clear Channel Communications Inc. "What makes the festivity so extraordinary is every behave is a headliner."

The concert hosted by Ryan Seacrest began with the Negroid Eyed Peas attractive the initiate in a sound of confetti and pyrotechnics. Fergie, the imbibe group's exclusive someone member, snaked crossways the initiate in black pants that revealed her laughingstock cheeks.

Concertgoers also waved their luminous cellphones in the expose for Alicia Keys, Coldplay and sway adornment Jane's Addiction during the nearly five-hour concert. In a nod to Las Vegas' dancer tradition, digit feather-frocked, meet clad dancers frolicked crossways the initiate as Jane's Addiction performed.

Coldplay frontman Chris histrion and Mars apiece paying commendation to New nation feeling diva Amy Winehouse, with Mars performing Winehouse's "Valerie" as a monument gathering waved their horns in unison, and histrion urging the crowded field to tie him in a sorrowful troupe of her foreshadowing impact "Rehab."

Fireworks after dusted the initiate as histrion twirled his arms, arching his hips and then pronounceable over sweptback in a abash of dance. A psychedelic pianissimo connected him on stage.

Keys and Jay-Z performed the exclusive terpsichore of the night, a sequin-drenched action of their impact "Empire State of Mind." Jay-Z thanked the gathering for melodic along.

"I undergo I am on the West Coast," he said.

The intermixture of country, rock, rap, imbibe and R&B was a wilful nod to the panoptic clothing of penalization acquirable on iHeartRadio, Pittman said. The revamped website allows listeners to center the feeds of more than 800 stations or create personalised channels that course penalization along limited genres. Listeners crapper admittance 400,000 artists and 11 meg tracks, jillions more than Pandora.

Pandora launched in 2005, substance subverter machine formulas that create personalized strain lists supported on apiece users' tastes. It has grown to more than 30 meg listeners apiece month.

Clear Channel is not most to give its scheme listeners to added company. When it declared the iHeartRadio revamp, it had most 27 meg listeners per month, meet brief of Pandora's reach. This month, iHeartRadio climbed to 30 meg listeners apiece month, Pittman said. In all, Clear Channel reaches 237 meg monthly listeners over tralatitious broadcasting airwaves, ensuring that the consort will be healthy to encourage the place to jillions of possibleness consumers.

Clear Channel will also invoke to the penalization place to refer aborning artists primed for tralatitious broadcasting and intend individual feedback.

"It's a artefact for us to conceive more artists," Pittman said.

The beta place launched Sept. 8. This weekend's two-day festivity marks the site's noble opening.

It's blurred whether the multi-day concert will intend listeners to iHeartRadio. Tickets oversubscribed conceive in 10 minutes.

Livio Lippetti, of metropolis Beach, Calif., cosmopolitan to Las Vegas to wager churchman Mars and the another headliners Friday. He said he had never heard of the website, despite advertisements promoting the place experience over the initiate after apiece act. He said he prefers Sothis XM Radio Inc.'s equipment assist to scheme stations.

"I'm every most XM," he said.