Professional ratings
Aggregate scores
Source	Rating
Metacritic	47/100
Review scores
Source	Rating
AllMusic
The A.V. Club	(D-)
Blender
The Boston Globe	(mixed)
The Guardian
The New York Times	(mixed)
Rolling Stone
PopMatters	(4/10)
Slant Magazine
Spin	(3/10)

One of the Boys is the second studio album by American singer Katy Perry. It was released on June 17, 2008 by Capitol Records. During the making of the album, Perry was dropped from two record labels and went through two canceled albums. She collaborated with producers Greg Wells, Dr. Luke, David A. Stewart, and Max Martin among others on the album. All songs were written by the singer, with assistance of some other producers and writers. It was composed in a pop-rock style. An EP, Ur So Gay, which contains the album's promotional single, "Ur So Gay", was released to generate interest on the singer and the then-upcoming album.

One of the Boys received mixed reception from critics. Some deemed it as being filled with "potential hits", while others criticized Perry's vocal performance. The album debuted at number nine on the US Billboard 200, with 47,000 copies sold in its first week. It was certified platinum by the Recording Industry Association of America (RIAA), and also reached the top ten in countries such as Austria, Canada, Germany, Mexico, and Switzerland. One of the Boys earned Perry two Grammy Award nominations, and has sold 7 million copies worldwide.

The first single released from the album, "I Kissed a Girl", became her first Billboard Hot 100 number-one single; the second single "Hot n Cold" reached number three in the US while topping charts in Germany, Canada, the Netherlands, and Austria. The album's third single, "Thinking of You", reached the top-thirty in the US, while the final single "Waking Up in Vegas" became a top-ten hit. To further promote the album, Perry embarked on three tours: Warped Tour 2008, her first solo world tour "Hello Katy Tour", as well as being the opening act in No Doubt's 2009 Summer Tour.

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Wikipedia