They grow up so fast, don't they? Spotify's US launch was just over a year ago, and the streaming music outlet wants us to know just how big its baby is getting. Americans listened to more than 13 billion tracks on the service in the first 365 days, and they shared more than twice as many -- 27,834,742, to be exact. Not surprisingly, just over half of that socializing went through Facebook, as you can see in the company's sugar-coated chart. Spotify is likewise flaunting 2,700 years' worth of time spent skulking around its app platform. Don't feel any pangs of regret if you forgot to buy something for Spotify's birthday, by the way: the company isn't holding any grudges and says you'll "love" what it has gift-wrapped for year two. We're hoping that involves more free radio stations and fewer holdout musicians.