Music streaming app now has 10 million paid-up Spotify Premium users, with unlimited access to albums and playlists - without annoying adverts - either at home or on the move.
A quarter of Spotify's users worldwide have a Spotify Premium subscription.
The free music service, available as an app for smartphones and tablets as well as on desktop PCs, Macs and laptops, now gives all users unlimited streaming, but imposes restrictions on mobile devices and sticks adverts between every three or four songs.
When you upgrade to Spotify Premium, which costs £9.99 a month, there are no adverts and no limitations on what you can stream via the app. You can even use Wi-Fi to download your playlists then listen offline when you don't have a connection.
Spotify has 40 million monthly active users in 56 countries around the world.
Daniel Ek, Spotify's chief executive, said: "10 million subscribers is an important milestone for both Spotify and the entire music industry.
"We're widening our lead in the digital music space and we'll continue to focus on getting everyone in the world to listen to more music."
The most-streamed artist on Spotify, which launched in 2007, is US rapper Eminem, while Avicii's song 'Wake Me Up' is the most-played track with over 230 million streams.
If you're a big music fan, then a £9.99 subscription to Spotify Premium offers really great value for money. You get unrestricted access to Spotify's near-infinite catalogue of songs and playlists for roughly the cost of one CD album.
One thing you need to bear in mind, however, is that Spotify streaming can use large amounts of data. This won't be a problem if your broadband's unlimited, but if you're using Spotify on a 3G or 4G mobile plan then you need to be wary of any usage limits.
While music streaming uses far less data than, say, watching a film in HD, you'll typically smash through around 65Mb an hour at standard quality. Spotify Premium allows higher quality streams, which can use up to twice as much data.
An easy way to avoid using lots of 3G or 4G data is to download your music using Wi-Fi and play the tracks offline when you're out and about. You'll need a Spotify Premium account to do this.
In any case, if you're a heavy user of the internet - particularly for streaming music, video, TV shows and films - you'll probably want to make sure your broadband's unlimited, and maybe even invest in unlimited mobile data as well. It doesn't always cost a lot extra.