Katy Perry's most popular song is thought to only be California gurls but, it could also be firework. you choose your favorite.
Katy Perrys favorite song is Killer Queen by Queen.
Waking up in Vegas by Katy Perry
You Are My Sunshine
A singer/song writer/actress
The genre is a slow love song
Katy Perrys favorite song is Killer Queen by Queen.
Wide Awake.
gangnam stylle
that she is as beautiful as a peacok
Waking up in Vegas by Katy Perry
You Are My Sunshine
A singer/song writer/actress
Yes it is in the movie soul surfer
tAs of now (August 15, 2010) California Gurls is the most popular Katy Perry song in America!
her real break up
As of 2011, the most popular song in the US is probably Firework by Katy Perry.
Her newest song is E.T (extra-terres-trial)