Apple will offer paying iTunes customers a free introductory offer that makes its new iCloud service free for a limited time, Los Angeles Times reports. Apple will then begin charging about $25 per year for the service, the report claims, and it will also serve advertisements to iCloud users. Apple is said to have signed deals with each of the four major U.S. music labels as well as some larger music publishers, which will reportedly allow the company to store music on cloud servers and stream songs to customers who have purchased them previously. Apple announced earlier this week that it will unveil iCloud alongside iOS 5 and Mac OS X Lion next week during its WWDC keynote on Monday, June 6th. BGR will be on hand to cover the event live.