We’re getting up close and personal with the five most popular songs in the Billboard Magazine Hot ___ pop singles chart, for the week ending ____ (month) __, ____.

Katy performs a brief set on September __ at London’s iTunes Festival, then returns home to California - on ____ (month) __, she’ll perform a charity show at the Hollywood Bowl.

We’re getting up close and personal with the five most popular songs in the Billboard Magazine Hot 100 pop singles chart, for the week ending September 28, 2013.

Katy performs a brief set on September 30 at London’s iTunes Festival, then returns home to California - on October 23, she’ll perform a charity show at the Hollywood Bowl.