EXCLUSIVE: Nicole Kidman reveals her favorite red carpet looks ever, talks birthday plans for husband Keith Urban

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Nicole Kidman has been a style icon for as long as we can remember, and the second annual InStyle Awards on Monday night in Los Angeles was no exception.

The statuesque actress stunned in a sexy pink-and-black Versace gown featuring a thigh-high slit, and paired it with gorgeous black T-strap pumps. Her elegant updo and a diamond bracelet completed the high fashion look.

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PICS: Nicole Kidman Stuns in Black-and-White Looks, Gushes About 'Screwball' Daughter

ET spoke with the Australian star at the event -- where she was fittingly honored with the Style Icon Award -- and she revealed her favorite red carpet looks of all time.

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Keith Urban and Nicole Kidman together
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Keith Urban and Nicole Kidman together
CENTURY CITY, CA - JUNE 16: Honoree Nicole Kidman (L) and recording artist Keith Urban attend the Women In Film 2015 Crystal + Lucy Awards Presented by Max Mara, BMW of North America, and Tiffany & Co. at the Hyatt Regency Century Plaza on June 16, 2015 in Century City, California. (Photo by Mark Davis/Getty Images for Women in Film)
NASHVILLE, TN - JUNE 10: Nicole Kidman and Keith Urban attend the 2015 CMT Music awards at the Bridgestone Arena on June 10, 2015 in Nashville, Tennessee. (Photo by C Flanigan/WireImage)
NASHVILLE, TN - JUNE 10: Nicole Kidman and Keith Urban attend the 2015 CMT Music awards at the Bridgestone Arena on June 10, 2015 in Nashville, Tennessee. (Photo by C Flanigan/WireImage)
HOLLYWOOD, CA - MAY 13: Singer Keith Urban and actress Nicole Kidman attend the 'American Idol' XIV grand finale at Dolby Theatre on May 13, 2015 in Hollywood, California. (Photo by Tommaso Boddi/WireImage)
LOS ANGELES, CA - FEBRUARY 08: (EDITORS NOTE: Image was processed using digital filters.) Musician Keith Urban and actress Nicole Kidman attend The 57th Annual GRAMMY Awards on February 8, 2015 in Los Angeles, California. (Photo by Christopher Polk/WireImage)
Australian actress Nicole Kidman (L) and her husband musician Keith Urban (R) kiss as they pose for pictures on the red carpet upon arrival for the world premiere of 'Paddington' in London on November 23, 2014. AFP PHOTO / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
NASHVILLE, TN - NOVEMBER 04: Actress Nicole Kidman and singer-songwriter Keith Urban attend the BMI 2014 Country Awards at BMI on November 4, 2014 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images for BMI)
MELBOURNE, AUSTRALIA - JUNE 13: Actress Nicole Kidman and Keith Urban attend the Celebrate Life Ball at Grand Hyatt Melbourne on June 13, 2014 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)
NASHVILLE, TN - JUNE 05: Musician Keith Urban and actress Nicole Kidman attend the 2013 CMT Music Awards at the Bridgestone Arena on June 5, 2013 in Nashville, Tennessee. (Photo by Jeff Kravitz/FilmMagic)
CANNES, FRANCE - MAY 19: Keith Urban and Nicole Kidman attend the Premiere of 'Inside Llewyn Davis' at The 66th Annual Cannes Film Festival on May 19, 2013 in Cannes, France. (Photo by Tony Barson/FilmMagic)
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"I think I like the Dior... you know, the chartreuse that I wore," she tells ET's Nischelle Turner, referring to the iconic brightly-colored John Galliano for Christian Dior satin gown she donned at the Oscars in 2007.

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"There was another beautiful gold Dior that no one comments on but was probably one of my favorites," she adds, also shouting out her bold look at the Oscars in 2000. "And I got to wear, like, the most beautiful 24-carat gold antique gloves that I still own -- fingerless gloves. There's just different things. I mean, so much of it for me is the combination of jewelry and dresses and the way it's all put together."

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Kidman, 49, says her sense of style comes from her mother, who actually made her clothes growing up.

"I think because I grew up with a mother who could sew, she would make all my clothes for me ever since I was little," she reveals. "So I was able to think things up and tear stuff out of magazines when I got to be a teenager, and she would make them for my sister and I. So, our prom dresses, my mom made."

"I think that's probably why I love clothes so much because I watch them... and really, I love couture because of that -- because I know what it takes to make things, and the mastery in a couture dress takes my breath away -- still takes my breath away," she notes.

Kidman was accompanied inside by her husband, Keith Urban, who she gushed was racing to the event to join her after performing on Jimmy Kimmel Live!. Kidman shares that she and her two daughters with Urban -- 8-year-old Sunday and 5-year-old Faith -- are planning a quiet celebration to mark his 49th birthday on Wednesday.

"He said, 'I want nothing big. I just want the four of us together,'" she explains. "But, we've organized things. We've got stuff. The girls and I have planned it. ... I think when you're just a really close family, the last thing you want to do is go out and have some big party. He just wants to be surrounded by his girls so that's what he's getting."

WATCH: Nicole Kidman Talks Marrying Ex Tom Cruise at a Young Age: 'I Look Back Now and I'm Like, 'What?'

Kidman and Urban celebrated their 10-year wedding anniversary in June, and clearly, appear more in love than ever. Watch the video below to see Kidman gush to ET over her hubby's music at the Academy of Country Music Awards in April, making him adorably blush!

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