in the top 15 Apple mobile apps, Top 100 for the top albums and singles from around the world (just got it free)
http://www.pcworld.com/article/230129/top_15_iphone_and_ipad_apps_that_cost_9...
Top 100 lists the top album and single charts from around the world. You can listen to any full songs from the listings, as well as watch the music videos. (It was listed on this site as $.99, but I just found it free in the iTunes Store. :-)