Photo flashback: Jessica Simpson's life and career in pictures, Gallery

Celebrate Jessica Simpson's 40th birthday by taking a look back and her life and career in pictures!

Jessica Simpson Celebrates Being 6 Years Sober By Sharing

Jessica Simpson Celebrates Six Years of Sobriety With Jarring

Jessica Simpson In The Press Room For The 32Nd Annual People'S Choice Awards, The Shrine Auditorium, Los Angeles, Ca, January 10, Photo By, Jessica Simpson 2006

Jessica Simpson Looks Fitter Than Ever in Latest Instagram!

Here's What Actually Happened With Nick Lachey And Jessica Simpson

Jessica Simpson flashes a bit of leg as she rocks cowboy boots in

Jessica Simpson's Memoir To Be Adapted As Show Starring Katelyn

Photo flashback: Jessica Simpson's life and career in pictures

Jessica Simpson on MTV TRL: A Nostalgic Flashback

Jessica Simpson posts 'unrecognizable' photo for 6 years sobriety

Jessica Simpson's Life and Career In Photos

Photo flashback: Jessica Simpson's life and career in pictures