Katy Perry's

#ROAR #Unconditionally #DarkHorse #Birthday. KATYCAT☀

[Katy Perry Indonesia @KatyPerryIndo]

Katy's microphones #ThePrismaticWorldTour

[KATY PERRY @katyperry]

Secrets out! Get your hands on us on Memorial Day @vmagazine @madonna 💋 http://t.co/KxaFPL68uy

[KATY PERRY @katyperry]

If ur wondering WHAT IS THAT REMIX of #BIRTHDAY @ the end of the video OR u just want it, then here: http://t.co/jyz4JmfWWf by @cashcash

[KATY PERRY @katyperry]

You know you're really on tour when: you have a debate over what day of the week it really is 😳

[KATY PERRY @katyperry]

Alas, I didn't catch Nessie...only it's remnants🙍 http://t.co/KuB1ndUK1w

[Chart News @chartnews]

Billboard Dance Club Songs: #1 (1 week) Warrior, @djhavanabrown | #11 Birthday, @katyperry (Greatest Gainer).

[KONTEN WOW! @kontenwow]

Perempuan paling rentan berselingkuh di usia 25 sampai 34 tahun. [DailyMail]

[Teeny Truth @TeenyTruth]

We don't lose friends. We just learn who our real ones are

[KATY PERRY DAILY @kpdaily]

You can find more info. about #KillerQueen "Royal Revolution" here: http://t.co/nqiVtwokZ1

[katyperrylately. @katyperrylately]

Check out the latest @katyperry outfit revealed for #ThePrismaticWorldTour!

[katyperrylately. @katyperrylately]

Another 2 @katyperry outfits for #ThePrismaticWorldTour have been by revealed by @vogue_italia http://t.co/0WDV5PEgHT