Walking On Air #1 on iTunes - Katy Perry - FOTP
Katy Perry Surges During Post-Holiday Lull – Rolling Stone
GLOBAL SUPERSTAR KATY PERRY ANNOUNCES MORE SHOW DATES TO HER HIGHLY ACCLAIMED LAS VEGAS RESIDENCY “KATY PERRY: PLAY” AT RESORTS WORLD THEATRE | Resorts World Las Vegas
Katy Perry Today on Twitter: "7 years ago today, @katyperry released “Dark Horse” ft. @therealjuicyj as the 3rd official single from “PRISM”. — Check out the main achievements: https://t.co/E6rdjIPB8H" / Twitter
900+ ❤KATY PERRY❤ ideas | katy perry, katy, perry
KATY PERRY STATS on Twitter: "The album “Smile” is receiving promotional banners on iTunes from several countries. #Smile https://t.co/Opf8uljtgO" / Twitter
iTunesCharts.net: 'Small Talk' by Katy Perry (American Songs iTunes Chart)
ITUNES US: Katy Perry - Rise 10 +3 - Charts - BCharts Fórum
Worldwide iTunes Album Chart: #165 Katy Perry - Prism (+40) | Katy perry, Katy perry music, Katy perry photos
Katy Perry's new album Witness faces stiff competition from Ed Sheeran, Hillsong Church, London Grammar on iTunes | PerthNow
Katy Perry's 'Witness' Shoots To #1 On iTunes Less Than 10 Minutes After Release - That Grape Juice
Katy Perry's 'Electric' Bolts to #1 on Worldwide iTunes - That Grape Juice
Katy Perry Lately! (@katyperrylately) | Songs, Katy perry, Girls talk boys
Firework (song) - Wikipedia
E.T. (song) - Wikipedia
Katy Perry – iTunes festival review | Katy Perry | The Guardian
KATY PERRY STATS on Twitter: "11 years ago, Katy Perry released her 2nd studio album TEENAGE DREAM and reset the meaning of POP PERFECTION. https://t.co/q63qSU8w9C" / Twitter
Katy Perry Charts on Twitter: ""PRISM"is now the 33rd biggest album on iTunes Worlwidd Music Album Chart in HISTORY, surpassing " Lemonade" https://t.co/EVGvqGsKfC" / Twitter
Katy Perry's 'Roar' tops the UK iTunes chart
