Let's make this birthday one to remember.

40 years old (Born on October 03, 1984)

American singer, actress, dancer; She is famous from Jessica Simpson's younger sister / Pieces Of Me.

Ranked #16 on the Maxim magazine Hot 100 of 2007 list. She is the little sister of pop singer Jessica Simpson. Their parents are Joe Simpson and Tina Simpson. Is the youngest person ever admitted to the School of American Ballet. She was admitted at the age of eleven. Ashlee was nominated for her performance in the film Undiscovered (2005), while Jessica was nominated for her performance in The Dukes of Hazzard (2005). Neither won the award, however. Her MTV show "The Ashlee Simpson Show" (2004) returned for a second season.

Is good friends with singer Fefe Dobson.

Announced her engagement to Peter Wentz on April 9, 2008.

Has dated Ryan Cabrera [June 2004]

Is good friends with actor Simon Cutmore.

Good friends with actor Simon Cutmore.

Featured on her sister, Jessica Simpson`s Christmas album with the track "Little Drummer Boy".

Is the youngest person ever admitted to the School of American Ballet.

Attended Prairie Creek Elementary.

She is a fan of the independent band, Stilletto Formal

Shares a birthday with No Doubt singer Gwen Stefani.

A distant relative of Al Gore.

She released her first CD, Autobiography, it hit platinum in the first week of release. [July 20, 2004]

Ex-sister-in-law of singer Nick Lachey.

Her MTV show "The Ashlee Simpson Show" (2004) returned for a second season.

On Forbes 2006 Richest Young Celebrities List, it is reported she earned $8.3 million in 2005.

Was nominated for the 2006 Razzie Award for Worst Supporting Actress along side her sister Jessica Simpson.

Her album "Autobiography" was certified 3x platinum.

Suffered from anorexia as a young teenager.

Lip-synched her performance on "Saturday Night Live" (1975) [October 2004]

Her album, Autobiography, hit #1 on the Billboard its first week out.

She was admitted at the age of eleven.

Dating Ryan Cabrera [June 2004]

Was nominated for the 2006 Razzie Award for Worst Supporting Actress along side her sister Jessica Simpson. Ashlee was nominated for her performance in the film Undiscovered (2005), while Jessica was nominated for her performance in The Dukes of Hazzard (2005). Neither won the award, however.

Personality described as "fiery and blunt"

Has a bracelet from Jessica inscribed: "If you can dream it, you can become it."

On Forbes 2006 Richest Young Celebrities List, it is reported she earned $8.3 million in 2005.

Is the ex-sister-in-law of singer Nick Lachey.

Featured on her sister, Jessica Simpson's Christmas album with the track "Little Drummer Boy".

Broke up with boyfriend of over two years, Josh Henderson [2004]