This online tool is very similar to Spotify in terms of design and organization. MusicBloo is divided into a left column that includes a search bar and access to the main sections and playlists; the main section where you can see all the albums and song lists; and a third column on the right side that shows a list of songs ready to be played.
In the option 'Popular Albums' you have access to the most listened to recent albums, while in the 'Popular Genres' section, you can find the top hits in rock, hip hop, pop, and country. There's also a tab for new releases where you can see the latest music to be released on the record market in real time.
Given that MusicBloo is entirely free, it's possible that this service won't be around for long. However, as long as it's up and running, you can enjoy the best music catalog available without any cost to you.