Apple reportedly managed to get all three major music labels - Warner Music Group, Universal Music Group and finally, Sony Music - on board its upcoming iRadio service.
According to AllThingsD, a person familiar with negotiations between the two companies claims that Sony Music has just signed on. Both companies were said to be unable to reach a deal earlier in May due to Apple's refusal to come to terms on a licensing deal with Sony Music.
While it is expected that Apple will make an official announcement next Monday at WWDC, there may still be other hurdles for Apple to clear. For example, Apple has yet to sign up with Sony / ATV, which is Sony Music's publishing arm.
Apple is widely believed to introduce iRadio as a music streaming service to take on Spotify and Google Music. AllThingsD believes that the iRadio service may not actually be launched next Monday. Apple will instead share more information about the service with developers.