Music Streaming Wars: Top 8 Contenders

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iTunes Radio

Background: Despite entering a crowded space, iTunes Radio could take online radio mainstream, much like iTunes did with digital music.

Specs: Free, but iTunes Radio will be ad-supported, so users will have to pony up for an iMatch subscription, which is a cloud back-up service for music that costs $25/year, to listen ad-free. ITunes Radio will feature a "buy" button hooked up to iTunes, personalized radio stations, and unlimited skips.

Will it work? Seeing as how Apple has an ecosystem to fall back on (and plenty to sell), iTunes Radio has plenty of advantages on its side. All three major music labels have signed on, and Apple reportedly negotiated the terms of its advertising payouts to copyright holders in its favor, bypassing the "pureplay" license that has hampered Pandora.