"What's this song?" Just ask Google, with the latest update to the Google Search app, to find out.
As you may have heard, the Google Now team put out a great update today (read more here: http://officialandroid.blogspot.com/2012/12/new-google-now-perfect-travel-companion.html).

My favorite feature? Sound Search integration! Now you can just say "What's this song?" or "What song is this?" and it will recognize it for you, without ever leaving Google Now. It even speaks the result back to you ("It's Sleepyhead by Passion Pit"). Very very handy!
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