Popsugar Celebrity Celebrity Evolutions Prepare to Be Shocked by How Much Christina Aguilera Has Changed 2 May 2018 by Ryan Roschke Image Source: Getty When Christina Aguilera burst onto the scene in 1999 with her debut self-titled album, she was just 19 years old. Now, she has an incredible career with seven albums under her belt, and back in August 2015, she gave birth to her second child. Also, if her appearance on The Tonight Show Starring Jimmy Fallon taught us anything new, it's that Christina is really, really good at pop star impressions. We thought it was high time we look back at her incredible transformation through the years, as well as the inspiring quotes about body image she's shared along the way. Keep reading to go all the way back to 1999. 1999 Image Source: Getty / James Devaney 1 / 48 1999 Image Source: Getty / Jeff Kravitz 2 / 48 2000 Image Source: Getty / James Devaney 3 / 48 2000 Image Source: Getty / J. Vespa 4 / 48 2000 Image Source: Getty / Jeff Kravitz 5 / 48 2001 Image Source: Getty / Kevin Mazur 6 / 48 2001 Image Source: Getty / Evan Agostini 7 / 48 2001 Image Source: Getty / Dave Hogan 8 / 48 2002 Image Source: Getty / Dave Hogan 9 / 48 2002 Image Source: Getty / Jim Spellman 10 / 48 2002 Image Source: Getty / Kevin Mazur 11 / 48 2003 Image Source: Getty / KMazur 12 / 48 2003 Image Source: Getty / KMazur 13 / 48 2003 Image Source: Getty / Jeff Kravitz 14 / 48 2004 Image Source: Getty / Chris Polk 15 / 48 2004 Image Source: Getty / James Devaney 16 / 48 2005 Image Source: Getty / Jason Merritt 17 / 48 2005 Image Source: Getty / Clive Rose 18 / 48 2006 Image Source: Getty / L. Cohen 19 / 48 2006 Image Source: Getty / KMazur 20 / 48 2006 Image Source: Getty / Dimitrios Kambouris 21 / 48 2007 Image Source: Getty / Dan MacMedan 22 / 48 2007 Image Source: Getty / Mat Szwajkos 23 / 48 2007 Image Source: Getty / Mark Sullivan 24 / 48 2008 Image Source: Getty / Kevin Mazur 25 / 48 2008 Image Source: Getty / Kevin Mazur 26 / 48 2009 Image Source: Getty / John Shearer 27 / 48 2009 Image Source: Getty / Steven Lawton 28 / 48 2010 Image Source: Getty / Kevin Winter 29 / 48 2010 Image Source: Getty / Michael Buckner 30 / 48 2010 Image Source: Getty / Christopher Polk/AMA2010 31 / 48 2011 Image Source: Getty / Hannes Magerstaedt 32 / 48 2011 Image Source: Getty / Kevork Djansezian 33 / 48 2012 Image Source: Getty / Frederick M. Brown 34 / 48 2012 Image Source: Getty / Michael Kovac 35 / 48 2013 Image Source: Getty / Jamie McCarthy 36 / 48 2013 Image Source: Getty / Valerie Macon 37 / 48 2013 Image Source: Getty / Jason Merritt 38 / 48 2014 Image Source: Getty / Steve Jennings 39 / 48 2014 Image Source: Getty / Chelsea Lauren 40 / 48 2015 Image Source: Getty / Anthony Harvey 41 / 48 2015 Image Source: Getty / Michael Loccisano 42 / 48 2015 Image Source: Getty / Kevin Mazur 43 / 48 2016 Image Source: Getty / Kevin Mazur 44 / 48 2016 Image Source: Getty / Jason LaVeris 45 / 48 2016 Image Source: Getty / Kevin Winter 46 / 48 2017 Image Source: Getty / Steve Granitz 47 / 48 2018 Image Source: Getty / gotpap/Bauer-Griffin 48 / 48 Celebrity EvolutionsChristina AguileraRed CarpetHairP!nkMusicBraidsNailsCelebrities