The Hello Katy Tour was the debut solo concert tour by American singer Katy Perry, in support of her second studio album, One of the Boys (2008). It ran from January 23, 2009, to November 28, 2009, and visited North America, Europe, Asia, and Australia.

Perry first announced the tour in November 2008, following the 2008 MTV Europe Music Awards, which she hosted.^[2] The tour's title was inspired by, and is a play on, the Japanese Sanrio character Hello Kitty. In an interview with Billboard, Perry stated, "I have the guy who creates stages for Madonna working on this tour; I'm indulging my obsession with fruit and cats and designing all different outfits."^{[citation needed]}

The stage design featured a white picket fence, mailbox, oversized pink flamingos, inflatable plastic fruit, and a giant cat named Kitty Purry that glowed during the encore. Perry had two costumes during the show. During the encore, she would appear dressed as a cat.^[3]

Each show opened with "California Girls" by The Beach Boys being played as Perry appeared on the stage. "Fingerprints", "One of the Boys", "Hot ‘n Cold", "Self Inflicted" and a cover of The Outfield’s "Your Love" followed. After this section, Perry would pick up her guitar and perform an acoustic version of "Mannequin" and "Thinking of You". The next songs were "Ur So Gay" and "Waking Up in Vegas", upon which confetti rained-down onto the audience. Perry continued her act with "Lost", "I'm Still Breathing", "I Think I'm Ready" and "If You Can Afford Me". At this point of the concert, Perry would exit the stage for a costume change and re-appear, dressed as a cat. A stage-prop of a massive cat’s head would glow as Perry covered Queen's song "Don't Stop Me Now". Perry would conclude the show with "I Kissed a Girl", and exit the stage after thanking the audience.

The Orange County Register called the tour "a surprisingly strong performance" in a positive review.^[4] In a negative review, Variety called the tour "chilly" and "calculated".^[5] Seventeen, impressed with the tour, posted a list of ten things they liked about it.^[6]

1. "Fingerprints"
2. "One of the Boys"
3. "Hokey Pokey"
4. "Hot n Cold"
5. "Self Inflicted"
6. "Mannequin"
7. "Thinking of You"
8. "Ur So Gay"
9. "Waking Up in Vegas"
10. "Lost"
11. "I'm Still Breathing"
12. "I Think I'm Ready"
13. "If You Can Afford Me"

Encore

14. "I Kissed a Girl"

Notes

1. "Hackensack", a Fountains of Wayne cover, was performed after "Lost" on August 21 and August 29.
2. "Don't Stop Me Now" was played before the encore on July 28. "Starstrukk" was played as an encore instead with a special appearance by 3OH!3.

^ a This concert is a part of the South by Southwest Festival.^[9]
^ b This concert is a part of the Dinah Shore Weekend.^[10]
^ c This concert is a part of the Schaeffer Eye Center Crawfish Boil.^[11]
^ d This concert is a part of the Grammy Celebration Concert Tour.^[12]
^ e This concert is a part of the Pinkpop Festival.^[13]
^ f This concert is a part of the Caribana Festival
^ g This concert is a part of the Hurricane Festival^[14]
^ h This concert is a part of the Southside Festival^[15]
^ i This concert is a part of the U18 Festival^[16]
^ j This concert is a part of the Nibe Festival
^ k This concert is a part of the Rock Werchter^[17]
^ l This concert is a part of the Main Square Festival
^ m This concert is a part of the T in the Park^[18]
^ n This concert is a part of the Oxegen^[19]
^ o Katy opened for No Doubt on this date; She later joined them on stage to sing a cover of Adam and the Ants' "Stand & Deliver".
^ p These concerts are a part of the V Festival^[20]
^ q This concert is a part of the Bumbershoot: Seattle's Music & Arts Festival
^ r This concert is for the benefit of the Typhoon "Ondoy" victims that happened last 23-30 of September, 2009 in the Philippines. Originally scheduled last 3 of October, 2009 but cancelled after Typhoon Ondoy struck the Philippines on 26 of September, 2009, one week before the original scheduled concert.^[21]