In a press event today in New York, Spotify CEO and founder Daniel Ek demoed a bevy of new Spotify features and functionalities, including a better discovery and personalization tool called Discover, a music saving tool called Collection, and the ability for fans to follow and connect with their favorite artists. The influencer tool launches in partnership with artists like Paul McCartney, Katy Perry and Justin Bieber. Ek also announced that Spotify had hit 20 million users, 5 million of which pay for premium subscriptions. Only one million US users subscribe.