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!

Reliving Jessica Simpson and Nick Lachey's Young Love

Jessica Simpson's Life and Career In Photos

Jessica Simpson And Her Daughter Share New Instagram Pics

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

Jessica Simpson Shares 'Unrecognizable' Photo Before Sobriety

Jessica Simpson's Transformation: From Singer To Fashion Guru — Photos

Jessica Simpson Celebrates Six Years of Sobriety With Jarring

Jessica Simpson Recalls Secret Romance With 'Massive Movie Star

Flashback! 18-Year-Old Ashlee Simpson Teases Jessica Simpson About

Jessica Simpson fans stunned at her mother Tina Simpson's age