Edit: Due to the fact that this article is old, the installation instructions may not work anymore. In order to successfully install the latest version of Amarok, please access the amarok tag and open the latest article (the one on top).
As you may know, Amarok is the default music player for KDE, but it can be also used with other Desktop Environments. The latest version available is Amarok 2.8 Beta, which has been recently released. For a full list of features and improvements, see this link.
In this article I will show you how to install Amarok 2.8 Beta on Ubuntu 13.04 Raring Ringtail, Ubuntu 12.10 Quantal Quetzal, Ubuntu 12.04 Precise Pangolin, Linux Mint 15 Olivia, Linux Mint 14 Nadia and Linux Mint 13 Maya.
Because it is available via the Kubuntu Backports Repository, installing Amarok 2.8 on Ubuntu and Linux Mint is easy. All you have to do is:
$ sudo add-apt-repository ppa:kubuntu-ppa/backports
$ sudo apt-get update
$ sudo apt-get install amarok