Such success meant that Katy Perry had officially become one of the industry's biggest pop stars, celebrated as much for her outsized behavior and outrageous fashion choices as the music itself. She continued touring through the summer of 2009 (albeit without McCoy, whose boyfriend status had been revoked earlier that year) and found time to tape an installment of MTV Unplugged, which was released in November. Meanwhile, she worked on a new album and started up a whirlwind romance with comedian Russell Brand, eventually becoming his wife, a short-lived marriage that would last for only a year. She would later begin an on-again, off-again relationship with adult-alternative singer/songwriter John Mayer. Recording sessions for her album wrapped up in early 2010, and Perry scored her second number one single with "California Gurls," which was released that May. The accompanying album, Teenage Dream, followed in August. The album was reissued in 2012 as Teenage Dream: The Complete Confection, with the bonus track "Wide Awake," earning Perry a Grammy nomination for Best Pop Solo Performance.
Prism In 2013, Perry announced the release of Prism, her fourth album, with the number one single "Roar." Written and produced in collaboration with a host of artists and producers (including Sia, Diplo, Max Martin, Bloodshy, and Emeli Sandé), it was inspired musically by Robyn, Britney Spears, Mariah Carey, and Prince, and lyrically by her past relationships. Appearing in October, it hit number one in the U.S. and U.K., followed by another Billboard chart-topper, "Dark Horse," featuring Juicy J.