The social space online changes rapidly. Feedback stays on top of emerging media news so you don’t have to. Here are the top 5 must-read social media articles of the week:

Surprise: 50% of iPad subscribers click “Allow”

50% of users who subscribe to online publications opt-in and allow Apple to share information with developers such as their name, email, and zip code. As CNN Money reports, “this discovery is “the surprising reason publishers are finally saying yes to Apple.””

Google Music Beta to stream 20,000 songs for free, official! (updated)

Google beta launched a cloud streaming service called “Music Beta by Google” that streams over 20,000 songs for free. The service allows you to create a playlist or select “Instant Mix” to have a playlist auto-created based off of one song. As Engadget described, “Google’s service will essentially mimic the music locker functionality of Amazon’s Cloud service, albeit without the ability to sell songs direct to consumers. Ouch. Unfortunately, Google’s plans to launch a more feature-complete service were derailed when discussions with the labels broke down.”

Facebook Finally Launches Improved Photo Tagging

Facebook has improved photo tagging. Users can now tag photos with the names of Pages and can tag people who aren’t on their friends list (as long as privacy settings allow for it).

EXPOSED: Facebook’s Plan To Plant Anti-Google Stories in the Press

Busted. Facebook has admitted to hiring PR firm Burson-Marsteller to raise concerns over Google’s privacy act (aka plant negative press). This plan backfired when blogger Chris Soghoian decided to publish emails from Burson asking him to write a negative piece on Google.

GrouponLive: An Online Ticketing Deals Marketplace From Groupon, Live Nation

GrouponLive is a new joint venture by Groupon and Live nation that is going to offer local online ticketing deals.

-Anna (@alucas9)