This is a tough one. Usain Bolt is a famous runner whereas katy perry is a sinnger. Katy has over 10 uk and us top of the chart records but bolt is posibly the worlds fastest man. i would say that Katy Perry is more famous than Usain Bolt.
katy perry
Katy Perry
Who is Katy Perry .
Katy Perry
katy perry
Katy Perry.
Katy Perry
Katy Perry of course
Katy Perry defianetly!
I think its Katy Perry!
elmo is famous for little kids katy perry is famous for big kids
Katy perry