With SingStar Viewer, you can browse and purchase songs from the SingStore, as well as watch, rate and review uploaded video clips, photos and profiles in the MySingStarOnline community – all without having to load a SingStar disc in your PS3.
Anyone with a PSN account will be able to download SingStar Viewer for free from the PlayStation Store and see what’s going on in the SingStar community and SingStore. Once downloaded, SingStar Viewer will sit on your XMB under the ‘Games’ category for quick access to the online community. If you’re already a SingStar owner and member of MySingStarOnline, then you can purchase from SingStore, rate video clips and leave comments for other players and interact with the SingStar community.
If you’re new to SingStar on PS3, then you can browse the SingStore and view community videos etc. (just not rate / review them). Take a look at the video to see SingStar Viewer in action, courtesy of the PlayStation.Blog.Europe: