Photos

Christina Aguilera: From hot mess to hot mama (of two)

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Christina Aguilera arrives at the 1999 MTV Music Video Awards held at the Metropolitan Opera House, Lincoln Center in New York City on September 9, 1999. (Photo by Frank Micelotta/ImageDirect)

Christina Aguilera just begins to show a hint of her wild side at the 1999 MTV Video Music Awards.

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Christina Aguilera performs during the 1st Annual Latin Grammy Awards broadcast at Staples Center in Los Angeles, Calif. on Wednesday September 13, 2000. Photo Credit: Frank Micelotta/Getty Images

Aguilera keeps it classy with just a sliver of skin at the Latin Grammy Awards in September 2000.

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Britney Spears (left) and Christina Aguilera at the 2000 MTV Video Music Awards at Radio City Music Hall in new York City, 9/7/00.

Aguilera plays nice with pop rival Britney Spears at the MTV Video Music Awards in September 2000.

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LOS ANGELES, UNITED STATES: US pop singer Christina Aguilera arrives at the "My VH1 Music Awards" 30 November 2000 in Los Angeles, California. AFP PHOTO/Lucy Nicholson (Photo credit should read LUCY NICHOLSON/AFP/Getty Images)

Showing off what was to become her awards show uniform for the early part of her career, Aguilera flaunts her legs, abs and cleavage in a lace-up ensemble at the My VH1 Music Awards in November 2000.

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385803 55: 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)

Aguilera gets cornrows for the 2001 Grammy Awards that February ...

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Christina Aguilera arrives at the 7th Annual Blockbuster Entertainment Awards at the Shrine Auditorium in Los Angeles Tuesday, April 10, 2001. Photo by Kevin Winter/Getty Images

... then when she looked like this at the 2001 Blockbuster Entertainment Awards in April, she said it was a result of taking them out.

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Christina Aguilera at KIIS-FM's 'Wango Tango' two day concert series at Dodger Stadium in Los Angeles, Ca. 6/16/01.Photo by Kevin Winter/Getty Images.

Surprisingly, Aguilera isn't delivering a Twisted Sister tribute performance at the KIIS FM Wango Tango concert in June 2001.

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Christina Aguilera on stage at the 2002 MTV Video Music Awards at Radio City Music Hall in New York City, August 29, 2002. Photo by Frank Micelotta/ImageDirect.

Aguilera shows off a lot of skin and some skunk hair at the MTV VMAs in September 2002.

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BARCELONA, SPAIN - NOVEMBER 14: U.S. singer Christina Aguilera makes a sexy performance, 14 November 2002 during her smash hit "Dirrty" at the MTV European Music Awards in Barcelona's Sant Jordi palace, Spain. AFP PHOTO / AP POOL Denis Doyle (Photo credit should read DENIS DOYLE/AFP/Getty Images)

The newly minted Xtina performs "Dirrty" at the MTV European Music Awards in November 2002.

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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 Frank Micelotta/Getty Images)

In August 2003, Aguilera channels a flamingo.

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Madonna and Christina Aguilera perform on stage during the 2003 MTV Video Music Awards at Radio City Music Hall on 28 August 28 2003 in New York City. AFP PHOTO GETTY IMAGES NORTH AMERICA/SCOTT GRIES U.S. TABLOIDS OUT (Photo credit should read Scott Gries/AFP/Getty Images)

Aguilera shares a somewhat forgotten kiss with Madonna onstage in August 2003 at the MTV Video Music Awards.

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

Aguilera lets it all hang out in November 2003 at a rehearsal for the MTV Europe Music Awards.

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LOS ANGELES, UNITED STATES: (FILES) Christina Aguilera holds up her Grammy in the Best Female Pop Vocal Performance category during the 46th Annual Annual Grammy Awards 08 February, 2004 at the Staples Center in Los Angeles, California. People Magazine, citing Aguilera's representative, reported 13 February, 2005 that Aguilera is engaged to marry her longtime boyfriend, music executive Jordan Bratman. The pair was on vacation when Bratman, 26, proposed to Aguilera, 23, 11 Februay, People said. They had been dating for more than two years. Bratman bought the blonde singer, whose hits include "Dirrty" and "Genie in a Bottle," a diamond ring designed by London-based jeweler Stephen Webster. AFP PHOTO/FILES/Hector MATA (Photo credit should read HECTOR MATA/AFP/Getty Images)

Aguilera nabs the Best Female Pop Vocal Grammy in February 2004.

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WEST HOLLYWOOD, CA - FEBRUARY 27: Singer Christina Aguilera arrives at the Vanity Fair Oscar Party at Mortons on February 27, 2005 in West Hollywood, California. (Photo by Mark Mainz/Getty Images)

A very tan Aguilera embraces an A-line for the first time at the Vanity Fair Oscar Party in February 2005.

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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 Bryan Bedder/Getty Images)

Aguilera's cleavage at the MTV Video Music Awards in August 2006 has viewers clutching their pearls.

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Shanghai, CHINA: US pop singer Christina Aguilera poses for photographers during a photo call in Shanghai, late 25 June 2007. Aguilera, a 4-time Grammy Award winner, will hold her first solo concert ever in Mainland China at Shanghai Grand Stage with a capacity of 8,400 seats on 26 June. AFP PHOTO/ LIU Jin (Photo credit should read LIU JIN/AFP/Getty Images)

Aguilera conceals the early stages of pregnancy beautifully in June 2007.

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LOS ANGELES - FEBRUARY 09: Recording artist Christina Aguilera attends the Broad Contemporary Art Museum opening at LACMA February 9, 2008 in Los Angeles, California. (Photo by David Livingston/Getty Images)

Aguilera feels anything but blue at an art museum opening in February 2007.

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LOS ANGELES, CA - SEPTEMBER 07: Singer Christina Aguilera arrives at the 2008 MTV Video Music Awards at Paramount Pictures Studios on September 7, 2008 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)

Aguilera flaunts her post-baby bod at the MTV Video Music Awards in September 2008.

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BEVERLY HILLS, CA - JANUARY 16: Singer/actress Christina Aguilera (R) and boyfriend Matt Rutler arrive at the 68th Annual Golden Globe Awards held at The Beverly Hilton hotel on January 16, 2011 in Beverly Hills, California. (Photo by Jason Merritt/Getty Images)

Aguilera shows off boyfriend Matthew Rutler at the Golden Globes in January 2011.

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ARLINGTON, TX - FEBRUARY 06: Singer Christina Aguilera sings the National Anthem during Super Bowl XLV at Cowboys Stadium on February 6, 2011 in Arlington, Texas. (Photo by Jamie Squire/Getty Images)

In February 2011, Aguilera delivers a rendition of the national anthem.

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CARDIFF, WALES - OCTOBER 08: Christina Aguilera performs at the 'Michael Forever Tribute Concert' at Millennium Stadium on October 8, 2011 in Cardiff, Wales. (Photo by Tim Alban/Getty Images)

Aguilera performs at the Michael Forever Tribute Concert in Wales in October 2011.

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LOS ANGELES, CA - NOVEMBER 20: Singer Christina Aguilera performs onstage at the 2011 American Music Awards held at Nokia Theatre L.A. LIVE on November 20, 2011 in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)

Aguilera squeezes into a fitted number at the American Music Awards in November 2011.

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GARDENA, CA - JANUARY 28: Christina Aguilera performs at the funeral of singer Etta James in the City Of Refuge Church on January 28, 2012 in Gardena, California. (Photo by Toby Canham/Getty Images)

Aguilera has a self-tanner malfunction at Etta James' funeral in January 2012.

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World Food Programme Ambassador singer Christina Aguilera (L) and US Secretary of State Hillary Clinton pose for a photo next to this year's McGovern Awards that were given to Aguilera and David Novak of Yum Brands, for their help fighting global hunger, on October 3, 2012, at the US Department of State in Washington, DC. AFP Photo/Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP/GettyImages)

Aguilera gives Hillary Clinton an eyeful at the McGovern Awards in October 2012.

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LOS ANGELES, CA - NOVEMBER 18: Singer Christina Aguilera attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

Aguilera does her figure no favors in November 2012 at the American Music Awards.

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Christina Aguilera attends the Time 100 Gala celebrating the Time 100 issue of the Most Influential People In The World at Jazz at Lincoln Center on April 23, 2013 in New York. AFP PHOTO / TIMOTHY A.CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

A newly svelte Aguilera shows off her hard work at the Time 100 Gala in April 2013.

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LOS ANGELES, CA - NOVEMBER 24: Singer Christina Aguilera attends the 2013 American Music Awards at Nokia Theatre L.A. Live on November 24, 2013 in Los Angeles, California. (Photo by Jason Kempin/Getty Images)

Aguilera is a lean singin' machine at the American Music Awards in November 2013.

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LOS ANGELES, CA - MAY 10: Recording artist Christina Aguilera attends 102.7 KIIS FM's 2014 Wango Tango at StubHub Center on May 10, 2014 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images For 102.7 KIIS FM's Wango Tango)

Aguilera shows off her baby bump in May 2014.