Each year, Spotify puts out its Year in Review, which includes its top tracks. Now, they’ve put out the 2011 edition.

It’s not all about the tracks though. This year’s review includes Spotify launching in five new countries, including the US, Denmark, Switzerland, Austria and Belgium.

The company also highlights a number of service improvements such as Spotify Apps, a new Radio mode, Facebook and iPod integration, support for BlackBerry and Windows Phone as well as “moving further into the home with the likes of Onkyo, Western Digital and Boxee”.

Spotify was also able to sign over 300,000 independent music labels to Spotify this year and add about 20,000 tracks per day. That’s pretty impressive.

In addition to all of that, spotify welcomed over one and a half million subscribers, taking its total number of paying users to 2.5 million. Paying users.

Spotify is clearly doing quite well, despite growing competition in the online music space. It will be interesting to see how this continues into next year.

If you go to the Spotify review site, you can view the top 100 tracks by country. Here’s a look at the top ten for the U.S.

Artists in the top 100 include: Foster the People, Gym Class Heroes, Adele, Rihanna, Maroon 5, Nicki Minaj, Skrillex, Pitbull, LMFAO, Drake, David Gueta, Flo Rida, Mumford & Sons, Coldplay, Lil Wayne, Cobra Starship, Katy Perry, Jason Derulo, Beyonce, Britney Spears, The Band Perry, Hot Chelle Rae, Jason Derulo, Snoop Dogg, Bad Meets Evil, Bruno Mars, OneRepublic, Swedish House Mafia, Lupe Fiasco, AWOLNATION, Kanye West, Bon Iver, Alexandra Stan, Selena Gomez & The Scene, Gavin DeGraw, Chris Brown, Lady Gaga, Florence & The Machine, MGMT and more.

Foster the People appeared on the list about 10 times. I was happy to see MGMT make the list.

If you launch the Spotify application, you can listen to the whole list.

The site also inclues staff picks for the best of 2011, as well as some other curated lists from musicians. It also looks at the top tracks month by month.