Katy Perry took the stage at Madison Square Garden as part of her Prismatic World Tour in a fittingly reflective crop top and skirt. (Kevin Mazur / Getty Images)
The Valentino music note gown that Katy Perry wore to this year’s Grammy Awards put a new twist on Hollywood glamour. (Wally Skalij / Los Angeles Times)
Katy Perry donned a light green Gucci gown with an embellished neckline for the Grammy Awards in 2013. (Kirk McKoy / Los Angeles Times)
Katy Perry paired an enormous hat shaped like a rose with an Alexis Mabille couture dress for the 2012 MusiCares Person of the Year Tribute. (Gina Ferazzi / Los Angeles Times)
Katy Perry sparkled in this white Armani gown, complete with feathered wings, at the 2011 Grammy Awards. (Kirk McKoy / Los Angeles Times)
Katy Perry’s peppermint-covered dress coordinated with the candy colors of her dancers’ ensembles on her California Dreams tour in 2011. (Jay L. Clendenin / Los Angeles Times)
A yellow dress dotted with hearts gives Katy Perry a leg up in a performance at the 2010 Victoria’s Secret Fashion Show. (Peter Foley / EPA)
Katy Perry’s retro-inspired style shines in a performance for the Grammy nominations in 2010. (Michael Robinson Chavez / Los Angeles Times)
The pop star paired yellow Vintage Jet Rag onesie with a red vintage belt and turquoise shoes by Nicholas Kirkwood at Bar Chloe on Second Street in Santa Monica in 2008. (Bob Chamberlin / Los Angeles Times)
Here, the songstress wore a gray and pink Shareen Vintage dress and Sonia Rykiel pumps. (Bob Chamberlin / Los Angeles Times)
Perry brings her style to her on-stage performances as well, like in this red party dress with a full skirt. (Alberto E. Rodriguez / Getty Images)
“There are definitely flavors of that 1940s pin-up in how I dress,” Perry has said. Here, she struck a pose at Z100’s Zootopia party at the Izod Center in New Jersey in 2009. (Rob Loud / Getty Images)
“I really like to look like a history book,” Perry has said. “I can look 1940s, I can look 1970s hippy hippie-chic, or sometimes I’ll pull that ‘80s Brooklyn hip-hop kid with the door-knocker earrings.” (Roger Kisby / Getty Images)
The Santa Barbara native wore this shimmering orange dress to the Guys Choice Awards in 2008. (Frederick M. Brown / Getty Images)
