GALLERY: Christina Aguilera’s Most Memorable Fashion Moments

9/9/99 New York, NY. Christina Aguilera at the MTV Video Music Awards. Photo by Brenda Chase/Online USA, Inc.

Christina Aguilera in Trish Summerville at MTV Video Music Awards 2000 held at Radio City Music Hall September 7, 2000 Photo by Nick Elgar/ImageDirect

Christina Aguilera at the 42nd Grammy Awards held in Los Angeles, CA on February 23, 2000 Photo by Scott Gries/ImageDirect

Christina Aguilera attending the American Teacher Awards in Los Angeles November 14, 1999 (Photo by Brenda Chase/Online USA/Newsmakers)

382643 05: Performer Christina Aguilera arrives at the "My VH1 Music Awards" November 30, 2000 at the Shrine Auditorium in Los Angeles, CA. (Photo by Chris Weeks/Liaison)

385803 54: Pop diva Christina Aguilera arrives at the 43rd Annual Grammy Awards February 21, 2001 at the Staples Center in Los Angeles, CA. (Photo by Chris Weeks/Liaison)

387717 15: Singer Christina Aguilera attends the Seventh Annual Blockbuster Awards 10 April 2001 in Los Angeles, CA. (Photo by Newsmakers)

Christina Aguilera during "Spankin' New Music Week" on TRL at the MTV studios in New York City. 11/4/02 Photo by Scott Gries/Getty Images

BEVERLY HILLS, CA - FEBRUARY 10: Singer Christina Aguilera arrives at the Clive Davis pre-Grammy party held at the Beverly Hilton on February 10, 2007 in Beverly Hills, California. (Photo by Vince Bucci/Getty Images)

NEW YORK - AUGUST 28: Singer Christina Aguilera arrives to the 2003 MTV Video Music Awards at Radio City Music Hall on August 28, 2003 in New York City. (Photo by Evan Agostini/Getty Images)

EDINBURGH, SCOTLAND - NOVEMBER 6: Christina Aguilera attends the MTV Europe Music Awards 2003 November 6, 2003 in Edinburgh, Scotland. (Photo by Getty Images)

CULVER CITY, CA - JUNE 5: Singer Christina Aguilera poses backstage at the 2004 MTV Movie Awards at the Sony Pictures Studios on June 5, 2004 in Culver City, California. The 2004 MTV Movie Awards will air on the MTV Network June 10, 2004 9 PM (ET/PT). (Photo by Frank Micelotta/Getty Images)

NEW YORK - JUNE 22: Singer Christina Aguilera arrives at Entertainment Weekly's "Must List" party at Buddha Bar June 22, 2006 in New York City. (Photo by Evan Agostini/Getty Images)

CULVER CITY, CA - JUNE 03: Singer Christina Aguilera arrives to the 2006 MTV Movie Awards at Sony Pictures Studio on June 3,2006 in Culver City, California. (Photo by Frazer Harrison/Getty Images)

NEW YORK - AUGUST 31: Singer Christina Aguilera attends the 2006 MTV Video Music Awards at Radio City Music Hall August 31, 2006 in New York City. (Photo by Evan Agostini/Getty Images)

NEW YORK - SEPTEMBER 07: Singer Christina Aguilera aattends Conde Nast Media Group's Third Annual Fashion Rocks Concert at Radio City Music Hall September 7, 2006 in New York City. (Photo by Peter Kramer/Getty Images)

BEVERLY HILLS, CA - JANUARY 17: Singer Christina Aguilera poses in the press room at the 67th Annual Golden Globe Awards held at The Beverly Hilton Hotel on January 17, 2010 in Beverly Hills, California. (Photo by Kevin Winter/Getty Images)

BEVERLY HILLS, CA - FEBRUARY 22: Recording artist Christina Aguilera attends the 2015 Vanity Fair Oscar Party hosted by Graydon Carter at Wallis Annenberg Center for the Performing Arts on February 22, 2015 in Beverly Hills, California. (Photo by Pascal Le Segretain/Getty Images)

MOUNTAIN VIEW, CA - NOVEMBER 08: Singer/songwriter Christina Aguilera attends the 2016 Breakthrough Prize Ceremony on November 8, 2015 in Mountain View, California. (Photo by Steve Jennings/Getty Images for Breakthrough Prize)

LAS VEGAS, NV - MAY 20: Recording artist Christina Aguilera attends the 2018 Billboard Music Awards at MGM Grand Garden Arena on May 20, 2018 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)

LOS ANGELES, CA - MAY 31: Christina Aguilera hosts an intimate listening party for her biggest fans on Pandora to preview her upcoming album, LIBERATION, at The Peppermint Club on May 31, 2018 in Los Angeles, California. (Photo by Neilson Barnard/Getty Images for Pandora Media, Inc.)

NEW YORK, NY - SEPTEMBER 07: Christina Aguilera attends Harper's BAZAAR Celebrates 'ICONS By Carine Roitfeld' at The Plaza Hotel on September 7, 2018 in New York City. (Photo by Dominik Bindl/Getty Images)

NEW YORK, NY - SEPTEMBER 08: Christina Aguilera attends the Christian Cowan - Front Row during New York Fashion Week: The Shows at Gallery II at Spring Studios on September 8, 2018 in New York City. (Photo by Mike Coppola/Getty Images)

NEW YORK, NEW YORK - DECEMBER 31: Christina Aguilera performs during the Times Square New Year's Eve 2019 Celebration on December 31, 2018 in New York City. (Photo by John Lamparski/Getty Images)

PARIS, FRANCE - JULY 03: Christina Aguilera attends the Jean Paul Gaultier Haute Couture Fall/Winter 2019 2020 show as part of Paris Fashion Week on July 03, 2019 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)