73/88
Brian Sweeney/Getty Images
She Loves the '90s
Like a lot of us, Katy had a grunge period.
74/88
Theo Wargo/Getty Images
Waking Up In Vegas
This is what you'd call a style gamble.
75/88
Michael Caulfield/Getty Images for VH1
Puttin' On the Glitz
Gold star for you, Katy!
76/88
ABC/RICK ROWELL
She's Red-y
Point 'em out, girl!
77/88
Kevin Mazur / Getty Images
Flying Solo
She just needs a little push.
78/88
Kevin Mazur/Wireimage
Sugar Rush
Lollipop and cupcakes and Katy, oh my!
79/88
Syamsul Bahri Muhammad/Getty Images
Lickety-Split
Well, that's just bananas!
80/88
ABC/Matt Brown
Memoirs of a Geisha
She likes to keep things colorful.
81/88
Getty Images/Getty Images
Lift Off!
Call this her Super Bowl practice.
82/88
Jeff Kravitz/Getty Images
Santa's Little Helper
Because one Santa costume is never enough.
83/88
Michael Caulfield/Getty Images for VH1
USA! USA!
God Bless America!
84/88
Kristian Dowling/Getty Images
Standing Tall
Doesn't it look like she could be singing: "Come at me, bro!"
85/88
Bob Levey/WireImage
Who Wears Short-Shorts?
Clearly she's a fan of hot pants.
86/88
Tim Mosenfelder/Getty Images
Teenage Dream
She's gotta have some glitter.
87/88
Mark Venema/Getty Images
In Print
Can you guess the design?
88/88
Kristian Dowling/Invision/AP Images
Down Under Duds
Hands up? Now wave them like you just don't care.