Katy Perry's Changing Looks

The then-blonde freshman, born Oct. 25, 1984, idolized Freddie Mercury.

The up-and-coming singer brought out her big blue eyes with choppy fringe.

Perry matched her rose lipstick to her '40s-style floral fascinator.

The aspiring singer rocked a golden glow-skin, eye shadow-for a Hollywood party.

Her smash hit "I Kissed a Girl" topped the charts and she began to develop her signature look: Betty Boop lashes and eminently kissable lips!

The return of the petals! The multi-platinum pop star hit a Chanel launch in pinup girl makeup and a veiled hat.

The Grammy nominee attended the awards show with Old Hollywood waves and bubblegum pink lipstick.

Perry framed her face with an blunt and graphic bob.

She got slimed at the Nickelodeon Kids' Choice Awards in Bettie Page bangs, winged liquid liner and hot pink lipstick.

In honor of her role as Smurfette in the upcoming Smurfs movie, Perry wore a bright blue wig to the MTV Movie Awards.

For the MuchMusic Video Awards in Toronto, she chose mauve lipstick and loose, grown-up waves.

Perry's Grammy Awards look was inspired by her outfit. "Katy's look was angelic, sparkly and ethereal," said her makeup artist Jake Bailey. "I wanted to play off the textures in the dress and wings." He swept lavender cream eye shadow across the lid and followed with a dusting of springy green shadow on the bottom lash line.

"If you see a ginger haired girl that looks like me, it's me!" Perry tweeted before the Canadian launch of her Purr fragrance. The singer remarked that she was spending three weeks as a redhead before going back to blonde.

Perry appeared at the premiere of The Smurfs with newly-blonde locks and Smurfette-blue liner.

Perry settled on a vibrant lilac hue for the MTV Video Music Awards.

At the American Music Awards, Perry decorated her hot pink chignon with cellophane flowers.

Costume switch at the AMAs! For her second look, Perry matched her fuchsia lipstick to her '40s-style pompadour.

There she goes again! Perry switched up her look, chopping her locks into an angled bob and lightening the hue to a baby-pink.

"Katy wanted to go this particular color blue for a few weeks now," colorist Rita Hazan told us of Perry's new look. "The blonde was not an interim color. She wanted to be blonde at the time, but knew it wouldn't be permanent, just another Katy Perry look! It didn't take long to transition to this color."

For Nickelodeon's Kids' Choice Awards, Perry opted for a blue and purple-streaked high ponytail.

"Her new color is what I call purple velvet," colorist Rita Hazan told InStyle.com of Perry's latest look. "It's dark and rich. It's very punk rock. I love creating colors for her because she always knows how to rock it!"

There she goes again! Perry went back to black, complementing the dramatic hue with an angled cut.

For her movie's European premiere, Perry swept back her violet-tinged locks into a '60s-inspired updo.

Perry went back to black for Comedy Central's Night of Too Many Stars.

For the Kids' Choice Awards, Perry rocked sleek retro waves and a pale pink lip.

Perry chose a dramatic, sky-high ponytail for the Jingle Bell Ball.

Tired of traditional black hair, the singer switched up her blunt bob with a funky "slime green" shade.

The singer returns to her signature dark tresses.

Proving once again that she is hair-color chameleon, the singer stepped out at the 57th Annual Grammy Awards with violet locks and loose waves.