AllThingsD reports that Apple has secured a deal with Sony to launch its long rumored iRadio service. You may recall Sony was the last major record label to secure as Apple had already signed deals with both Warner and Universal. We expect to see iRadio previewed at WWDC which kicks off Monday.

Sony Music has signed on to Apple’s forthcoming iRadio service, according to a person familiar with negotiations between the two companies.

WSJ previously reported that Apple will pay Warner 10% of ad revenue, which is about twice as much as Pandora contributes. Apple’s own iAd service is set to refocus its attention on supporting the music streaming service with audio ads for the first time since its launch.

Peter Kafka goes on to report that it’s possible that Sony/ATV, its publishing wing, may not have officially inked its deal with Apple:

It’s still possible that Apple may have hurdles to clear. As of earlier this week, the company had yet to sign up Sony/ATV, Sony’s music publishing arm. But the gaps between Sony/ATV and Apple were supposedly smaller than the ones between Sony Music and Apple were looking at a few days ago.

While Apple’s iRadio service should be announced on Monday, it is possible it won’t be available for end users until later this year when iOS 7 completes development. Similarly, the iCloud-based iTunes Match service was announced with the preview of iOS 5 and made available to members of Apple’s iOS Developer Program in June 2011, but saw a delayed launch following iOS 5’s release in October later that year.

Tune in Monday at 10 a.m. PST/1 p.m. EST for our live coverage of Apple’s Worldwide Developer Conference where we’ll be on location. In the mean time, you can check out our comprehensive preview of what we expect to see at WWDC.

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