Perhaps as just as popular for her hair colour and fearless beauty looks as her music, Katy Perry has been wowing us with her "look at me" approach to hair and makeup since she first arrived on the pop music scene. Easily transitioning from a bright green tousled chop to a glossy black vintage wave, she never fails at providing us endless hair inspiration (and also inciting a tiny bit of colour-induced jealousy). In honour of her birthday, we pulled together some of her best (and craziest!) hair moments.
Keep scrolling to see Katy Perry's craziest hair transformations!
Perry's California Gurls-era blue wig was just the beginning of her obsession with brightly colored coiffures (this is also the look that spurred a thousand Halloween costume ideas).
A few months later, she was back to long, dark, flowing goddess-locks.
In 2011, she also briefly sported auburn-hued hair (and cute cat ears).
Right before that, she had blonde hair for the world premiere of The Smurfs.
A year later, in 2011, she showed up to the MTV Video Music Awards with a distinctly pink bob.
She styled the same bright hue completely differently at the American Music Awards, for a high-fashion, architectural look.
Already ahead of the rose gold trend, Katy rocked the hue all the way back in December 2011 (with a super-sleek bob, to boot).
Later that same month, she ditched the pink tones and added in a blue streak for an appearance at The Grove in Los Angeles.
2012 was clearly the year of the high-as-you-can-get-it ponytail. (The brighter the color, the better.)
We'll see her with this Cleopatra-inspired haircut again in 2014 (albeit in a different hue).
Only Katy could pull off a long My Little Pony-esque mane with a highlighter green top and hot pink lipstick. Proof that it's all about confidence.
Who would have thought purple hair could be so sultry?
Perry styled her purple streaks completely differently, and they looked simply gorge against her inky-black bun.
The braided headband she donned in 2012 was a soft, romantic departure from her boldly colored hair the previous year.
She took a brief break from color in 2013, wearing her hair in vintage-inspired waves.
Then in March of that year, she unveiled a shorter, collarbone-grazing style.
We have to say, we're kind of digging the Princess-Leia-meets-Minnie-Mouse vibe of these braided buns.
This curly, tousled bob is perfection.
Baby bangs and a perky updo bring Perry back to her retro-inspired roots.
Perry's giant updo at the 2014 Grammy Awards had unexpected twists, which made it a head-turner on the red carpet.
Perry shocked everyone by debuting a shocking "slime-green" crop that she, unsurprisingly, wears like a boss.
Which of her looks is your favorite? Sound off in the comments below!