Katy Perry talks "Teenage Dream"

Katy Perry - Making of “California Gurls” Music Video

Katy Perry - Making of “California Gurls” Music Video

Katy Perry - Ask Katy

Katy Perry - Ask Katy

Katy Perry talks "California Gurls"

Katy Perry talks "California Gurls"

Katy Perry - California Gurls (Official Music Video) ft. Snoop Dogg

Katy Perry - California Gurls (Official Music Video) ft. Snoop Dogg

Katy Perry - The CW Sizzle Reel

Katy Perry - The CW Sizzle Reel

Katy Perry - California Gurls ft. Snoop (Lyric Video)

Katy Perry - California Gurls ft. Snoop (Lyric Video)

Katy Perry - Waking Up In Vegas (Official)

Katy Perry - Thinking Of You (Official)

Katy Perry - YouTube Live

Katy Perry - YouTube Live

Katy Perry - Hot N Cold (Official Music Video)

Katy Perry - Hot N Cold (Official Music Video)

MTV Invites Katy to Host their Europe Music Awards...