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With Google Play you can:
- Store up to 20,000 songs for free and buy millions of new tracks
- Download more than 450,000 Android apps and games
- Browse the world’s largest selection of eBooks
- Rent thousands of your favorite movies, including new releases and HD titles
Starting today, Android Market, Google Music and the Google eBookstore will become part of
Google Play. On your Android phone or tablet, Google will be upgrading the Android Market app to the Google Play Store app over the coming days. Your videos, books and music apps (in countries where they are available) will also be upgraded to Google Play Movies, Google Play Books and Google Play Music apps. The music, movies, books and apps you’ve purchased will continue to be available to you through Google Play—simply log in with your Google account like always.
To celebrate, Google will be offering a different album, book, video rental and Android app at a special price each day for the next week in their “7 Days to Play” sale. 
To learn more, head over to play.google.com/about
Google Play or the new Android Market
