Spotify may not have the massive marketing muscle behind it like that of new entrant Beats Music, but the small streaming service is looking to expand its reach in other ways. Today, the company announced a partnership that'll see the entirety of its music catalog made available for playback on Last.fm. Now, when Last.fm users click play on a track, Spotify will be launched in the background, with a convenient bar for playback controls appearing at the bottom of the screen. Additionally, any grouping of tracks on a particular Last.fm page will appear as a playlist within Spotify. The integration is pretty straightforward to get set up, as all you'll need to connect your Last.fm and Spotify accounts, whether free or premium, is to click on a track and initiate playback. There's not much else to it beyond that. Just don't expect this Spotify and Last.fm integration to work on your smartphone or tablet, as it's not currently supported on mobile browsers. There are also a few known bugs for the service to work out, like unavailable tracks showing play buttons and only the first 70 displayed tracks on a page being made available for playback. Oh, and it should go without saying that if you're in a territory where Spotify's not yet available, well, you'll have to sit this one out.