Here’s a little behind the scenes video of Katy Perry’s California Dreams Tour.

Katy Perry sings her new single The One That Got Away then covers Adele’s Someone Like You. LOVE her voice.

Here’s a behind the scenes video for the making of Katy Perry’s video for Last Friday Night (T.G.I.F), with special appearances by Kathy Beth Terry, Rebecca Black, Darren Criss and Kevin McHale from Glee, Hanson, Debbie Gibson, Corey Feldman and Kenny G!

Hmmm. Who does Born This Way better, Lady GaGa or Katy Perry?

James Blunt covers “California Gurls.” Not too weird?

Bruno Mars does a sweet cover of Katy Perry’s California Gurls for our pals at BBC Radio 1.

I’m not a fan of mash up’s, but DJ Earworm puts a lot of work into them. It won’t kill me to highlight his newest work. He somehow manages to mix all these songs together:

• Ke$ha - Tik Tok
• Lady Antebellum - Need You Now
• Train - Hey, Soul Sister
• Katy Perry featuring Snoop Dogg - California Gurls
• Usher featuring Will.I.Am - OMG
• B.O.B. featuring Hayley Williams - Airplanes
• Eminem featuring Rihanna - Love the Way You Lie
• Lady Gaga - Bad Romance
• Taio Cruz - Dynamite
• Taio Cruz featuring Ludacris - Break Your Heart
• B.O.B. featuring Bruno Mars - Nothin’ On You
• Enrique Iglesias featuring Pitbull - I Like It
• Young Money featuring Lloyd - Bedrock
• Jason Derulo - In My Head
• Rihanna - Rude Boy
• Lady Gaga featuring Beyonce - Telephone
• Katy Perry - Teenage Dream
• Bruno Mars - Just the Way You Are
• Mike Posner - Cooler Than Me
• The Black Eyed Peas - Imma Be
• Jay-Z featuring Alicia Keys - Empire State of Mind
• Usher featuring Pitbull - DJ Got Us Fallin’ In Love
• Travie McCoy featuring Bruno Mars - Billionaire
• Eminem - Not Afraid
• Iyaz - Replay

Here’s my Web Watcher from two weeks ago, featuring Mike Tompkins. I featured him previously for his awesome beat box of Katy Perry’s Teenage Dream and Bruno Mars’ Just The Way You Are. If you know someone who should be featuring on my Weekend Countdown Web Watchers, then hit me up on Twitter.

Ahem, Victoria Secrets angel’s singing Katy Perry’s Firework. Your welcome. You can watch Katy Perry perform, in some AMAZING outfits, on the Victoria Secret Fashion Show tomorrow at 10pm ET on CBS. Enjoy!

A little boy lip singing to Katy Perry’s Teenage Dream? Don’t mind if I do!