After hearing buzz for a bit now, Twitter officially released their music app today. Twitter #Music (really, a hashtag in the name?) pulls tunes from Spotify, iTunes, and Rdio, and is set on helping users discover music they’ll love. Organized in a few simple pages, you can swipe through popular songs, emerging artists, songs you might enjoy based on the artists you follow, and what music your friends are listening to. You’ll still need a Spotify or Rdio account to hear full tracks (you get iTunes previews), but the ability to go follow artists and see who they listen to is a nice touch that other services haven’t gotten right yet. With Twitter’s popularity already, it’s hard to imagine it not doing well.