Last.fm was acquired by CBS Interactive more than four years ago, and it seems that the broadcaster is now aiming to brings some of its digital products closer together.

Last.fm has been added to Radio.com, CBS’s online player, which already streams audio from hundreds of stations including CBS Radio, whilst it also hosts both Yahoo! and AOL’s music streams.

Visitors to Radio.com will now be able to create their own online stations via one-click functionality enabled through its Last.fm integration. Last.fm’s library has more than 4.m million artists and around 12 million tracks. Radio.com will give listeners an infinite number of free streams across broadcast, online and personalized radio.

How exactly will it work? Well, users click the ‘create a station’ button now available within the player, and they enter an artist’s name and hit the play button. You will also be invited to listen to related music which you can choose to love, ban or skip…depending on what mood you’re in.

David Goodman, President of CBS Interactive Music Group, said:

“Premium content from major market brands like KROQ and WXRT, for example, is in high demand and will continue to foster growth online for many years to come.  But in a world where consumers expect more and more control over their audio consumption we’re pleased to provide them with the best of both worlds.”

Last.fm was founded in the UK in 2002, and today it has over 40m listeners in almost 200 countries. Its integration with Radio.com has been a long time coming, and it should drive interest in Last.fm even further. It’s important to note, however, that the integration is entirely one-way – Radio.com won’t be featured on Last.fm.

Mobile users will have to wait too – the integration is limited to its standard website, but Radio.com’s mobile app will include the integration at a later date.