100 most popular people

What are the Most Popular songs in Japan and who are the most popular singers?

We are having a Japanese exchange student come stay with us this summer and I was wondering what music was popular with teenagers there. I know everyone has their own taste in music, but who are the obviously most popular singers and songs. You know, like our Lady Gaga and Katy Perry and Bruno Mars.

What is the Most Popular buying guide in your country?

Is YELLOWPAGES really popular in this countries.
1) USA
2) Germany
3) China

If not can you let me know what is the most popular buying guide in your country.

USA = ? Which is the most popular Buying Search Tool?
China = ? Which is the most popular Buying Search Tool?
Germany = ? Which is the most popular Buying Search Tool?

What are the Most Popular hobbies around the world?

Where can I find information as to what is the most popular hobby, the second most popular hobby, third most popular hobby, etc. etc. I have tried internet searches and cannot find this information.