Style

8 of our favorite out-of-the-box celeb hair colors, from lavender to green

If you thought last year's gray hair trend was "out there," think again.

We're looking back at even wilder, more double-take-worthy hair colors ... as prompted by the one and only Christina Aguilera on Monday night's episode of "The Voice."

NBC via Getty Images
Christina Aguilera on "The Voice," May 2016.

The songstress dyed her hair lavender, and to keep things from getting too feminine, she added a few hair piercings in the form of metal rings that cinched a face-framing braid.

But Xtina's not the only one to have ever opted for a totally daring, unprecedented hair color — and she's also not the only one to look really, really good with it, either. We've rounded up a few of our favorite non-traditional hair colors.

Pink: Helen Mirren

Getty Images
Helen Mirren attends the EE British Academy Film Awards at The Royal Opera House on February 10, 2013 in London.

Who can forget 2013's greatest hair adventure? Helen Mirren's pink pixie! Mirren, now 70 (though always ageless), told the BBC: "I’d been watching America’s Top Model which I’m obsessed by... this girl had her pink hair and I noticed because it came out really quickly so there she is with really pink hair and then five days later it’s all gone so I thought that would be cool, I might have a go at that."

Rose gold: Sienna Miller

Getty Images
Sienna Miller attends the British Fashion Awards 2013 at London Coliseum on December 2, 2013 in London.

Another star of 2013 was Miller's rose-gold color. It was, simply put, the stuff hair dreams are made of. Just a touch of pink made this look a little less crazy than fully-dyed head of hair, but the resulting glowy hue was still stunningly original.

RELATED: Which blond is best for you? 5 summer hair colors to try now

Halloween green: Katy Perry

Getty Images
Katy Perry attends a benefit for Marianne Williamson on April 8, 2014 in Los Angeles, California.

Who else could pull off a mean, green look but the princess of pop herself? Perry made this bold choice back in 2014, and it's still convincing us that, done correctly, serious and unexpected color can be beautiful.

Fairytale purple: Nicole Richie

Getty Images
Nicole Richie attends the "Charles James: Beyond Fashion" Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York.

Richie went for this purple look back in 2014, and we're still marveling at how classy she managed to make such a risky choice look.

Orange: Kristen Stewart

Sure, Stewart dyed her hair for a role — and maybe "orange" isn't as unexpected as, say, bright green. But that doesn't make it any less awesome. The stark and vibrant hue was an obvious departure from the more mundane red-head options.

Getty Images
Kristen Stewart attends the "Clouds Of Sils Maria" premiere during the 67th Annual Cannes Film Festival on May 23, 2014 in Cannes, France.

Lavender and grey: Jennifer Hudson

#Face #ShadesOfGrey #Lilac @iamjhud @yolondafredrick

A photo posted by César DeLeön Ramirêz (@cesar4styles) on

Leave it to J. Hud to blow this one out of the water. Not only does she manage to make a purple-grey combo look stunning, she's also got this reporter convinced that a serious chop might not be a bad idea.

Pink streaks: Rachel McAdams

Nobody can forget Rachel McAdams' stunning foray into the "crazy color" world. She made waves with these subtle but oh-so-daring pink streaks back in 2007.

Getty Images
Actress Rachel McAdams arrives at the 13th Annual Screen Actors Guild Awards held at the Shrine Auditorium on January 28, 2007 in Los Angeles, California.
0:00
 
0:00
Your video begins in
0:00
TOP