Hannah Montana: Rock Out the Show

 is a music game developed by Page 44 Studios and published by Disney Interactive on August 4, 2009 for the Sony PSP. The game featured 4 DLCs with additional modes, but with the shut down of the PSP frontend online shop they can no longer be obtained on the original console. The PS Vita release of the PSP version allows to download all of the content, but to be able to get everything on the original hardware a Sony PS3 is needed (see below for details).

How to obtain
The DLCs can still be obtained on the PS Vita release from the Playstation Store or, on the PSP, by purchasing the content on a Playstation 3 system and then transferring it on the handheld console.

A guide on how to transfer content can be found here.