Cantora, compositora e atriz, Katy iniciou sua carreira cantando em igrejas e lançou um álbum de estúdio de música gospel em 2001, intitulado Katy Hudson. Mas que teve suas vendas canceladas devido ao fechamento da Red Hill Records, gravadora que produziu o álbum.
----- Mantenham o torrent ativo -----
( Álbuns de Estúdio )
2001 - Katy Hudson - (US)
2008 - One Of The Boys (Japanese Edition)
2009 - One Of The Boys (Platinum Australian Tour Edition)
2010 - Teenage Dream (Deluxe Edition) (Tri-Fold Digipack) - (EU)
2010 - Teenage Dream (Limited Deluxe Edition) - (US)
2012 - Teenage Dream: The Complete Confection (Limited Edition) - (UK & EU)
2013 - Prism (Japanese Deluxe Edition)
( Álbuns ao vivo )
2009 - MTV Unplugged (Limited Edition) - (US)
2015 - Super Bowl XLIX Halftime Show (Katy Perry, Lenny Kravitz & Missy Elliott) - (US)
( Álbuns em Vinil )
2009 - One Of The Boys (Platinum Edition) (2 Vinyl LP) - (EU)
2014 - Prism (Limited Edition) (2 Vinyl LP) - (EU)
2009 - The Matrix (Feat. Katy Perry & Adam Longlands) - (US)
2014 - Prism (Acoustic Sessions) - (EU)
( Singles )
2008 - Hot N Cold (CD Single) - (EU)
2008 - Hot N Cold (CD Single) - (US)
2008 - Hot N Cold (Remixes) (CD Maxi-Single) - (UK)
2008 - Hot N Cold (Rock Version) (Single) - (EU)
2008 - I Kissed A Girl (CD Maxi-Single) - (EU)
2008 - I Kissed A Girl (Deejay Exclusive United) - (UK)
2008 - I Kissed A Girl (Remixes) (CD Maxi-Single) - (EU)
2008 - White Christmas (Single) - (US)
2009 - Starstrukk (3OH!3 Feat. Katy Perry) (CD Single) - (US)
2009 - Thinking Of You (CD Single) - (UK)
2009 - Waking Up in Vegas (CD Maxi-Single) - (UK & EU)
2009 - Waking Up in Vegas (The Remixes) (CD Maxi-Single Promo) - (US)
2010 - California Gurls (CD Single) - (US)
2010 - California Gurls (Remixes) (CD Maxi-Single Promo) - (UK)
2010 - Firework (CD Single) - (DE & AU & CH)
2010 - If We Ever Meet Again (Timbaland Feat. Katy Perry ) (CD Maxi-Single Promo) - (FR)
2010 - If We Ever Meet Again (Timbaland With Katy Perry) (CD Single) - (EU)
2010 - Teenage Dream (CD Maxi-Single Promo) - (US)
2011 - E.T. (CD Maxi-Single Promo) - (US)
2011 - E.T. (Feat. Kanye West) (CD Single) - (DE & AU & CH)
2011 - E.T. (Remixes) (CD Maxi-Single Promo) - (US)
2011 - Last Friday Night (T.G.I.F.) (CD Maxi-Single Promo) - (US)
2011 - Last Friday Night (T.G.I.F.) (Remixes) (CD Maxi-Single Promo) - (US)
2011 - The One That Got Away (CD Maxi-Single Promo) - (US)
2011 - The One That Got Away (Feat. B.o.B) (Single) - (US)
2011 - The One That Got Away (The Remixes) (CD Maxi-Single Promo) - (EU)
2012 - Part Of Me (CD Single Promo) - (US)
2012 - Part Of Me (The Remixes) (CD Maxi-Single Promo) - (UK)
2012 - Teenage Dream (Kaskade Club Remix) (Single) - (UK)
2012 - Wide Awake Pt. 1 (CD Maxi-Single Promo) - (US)
2012 - Wide Awake Pt. 2 (CD Maxi-Single Promo) - (US)
2013 - Roar (CD Single) - (DE & AT & CH)
2013 - Roar (Jump Smokers Remix) (CD Single) - (US)
2013 - Roar (The Remixes) (CD Maxi-Single Promo) - (US & EU)
2013 - Unconditionally (CD Single) - (DE & AT & CH)
2013 - Unconditionally (Country Club Martini Crew Remixes) (CD Maxi-Single) - (EU)
2013 - Unconditionally (The Remixes) (CD Maxi-Single Promo) - (EU)
2013 - Unconditionally (Tracy Young Remixes) (CD Maxi-Single) - (EU)
2013 - Walking On Air (Remixes) (CD Maxi-Single Promo) - (US)
2013 - Who You Love (John Mayer & Katy Perry) (Single) - (EU)
2014 - Birthday (Cash Cash Remix) (Single) - (US)
2014 - Birthday (CD Maxi-Single Promo) - (EU)
2014 - Birthday (CD Single Promo) - (UK)
2014 - Birthday (Remixes) (CD Maxi-Single Promo) - (US)
2014 - Dark Horse (Feat. Juicy J) (CD Single) - (DE & AT & CH)
2014 - Dark Horse (Feat. Juicy J) (DJ AKS Remix) (Single) - (UK)
2014 - Dark Horse (Remixes) (CD Maxi-Single Promo) - (US)
2014 - Dark Horse (Worldwide Remixes) (Feat. Pitbull) (CD Single) - (US)
2014 - Legends Never Die (Ferras Feat. Katy Perry) (Single) - (EU)
2014 - Prism (Country Club Martini Crew Megamix) (Single) - (US)
2014 - This Is How We Do (Brillz Remix) (Single) - (US)
2014 - This Is How We Do (Feat. Riff Raff) (Single) - (US)
2014 - This Is How We Do (Remixes) (CD Maxi-Single Promo) - (US)
2015 - Dark Horse (Feat. TEE) (Single) - (JP)
2015 - Unconditionally (Manufactured Superstars Remix) (Single) - (NL)