When Google announced the beta roll out of YouTube Music Key earlier this week, how to jump on board was unclear, except for this link to sign up and they'd let you know. Overnight, came word that Google is sending emails to current Google Play Music subscribers letting them in next week. MORE: YouTube Music Key Streaming Service Finally Launches - Free & Paid Related articles YouTube Music Key Streaming Service Finally Launches - Free & Paid 10 Thoughts On YouTube Music Key Google Play Music Introduces Songza Integration YouTube Cuts Merlin Deal To Bring Indies To Music Subscription Service...

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