Hosted "Saturday Night Live" (1975) on 17 January 2004 with her husband, Nick Lachey. She parodied Britney Spears and Paris Hilton.
Auditioned for "MMC" (1989) as a child, but lost the part to future stars like Britney Spears and Christina Aguilera (who was later her competition in the music industry).
Pretty Woman (1990) is her all time favorite movie.
Recorded a cover of "A Whole New World" with husband Nick Lachey for the Aladdin (1992) Special Edition DVD.
1995 graduate of Richardson North Junior High in Richardson, Texas, where she was a cheerleader and a part of the co-ed choir.
Attended J.J. Pearce High School in Richardson, Texas (1995-1998), where she was very active in theater arts. She dropped out as a junior to further pursue her singing career.
Met ex-husband, Nick Lachey, at a charity event in 1998 where she was performing alongside Lachey's group, 98 Degrees.
Turned down a part in Coyote Ugly (2000).
Performed at the 2000 American Music Awards.
Is the "oldest" of the 4 current most famous "pop queens" in music (the others are Britney Spears, Christina Aguilera and Mandy Moore); she was the first one to leave behind her teenage years, after she reached her 20th birthday in 2000.
The mansion owned by her and Nick Lachey located in Calabasas, California, USA was placed on the market for $3,750,000 and bought by Justin Berfield of "Malcolm in the Middle" (2000) fame.
Performed at President George W. Bush's Inauguration (2001).
Engaged to 98 Degrees singer Nick Lachey. [February 2002]
Ranked #43 in Stuff magazine's "102 Sexiest Women in the World" (2002).
Was featured as #20 in Maxim Magazine's "Hot 100 of 2002" supplement. (2002)
In her October 2002 rainy-day Austin wedding to Nick Lachey, she wore a beaded, strapless gown designed by Vera Wang. She also carried a 500-stem stephanotis bouquet from Mark's Garden (in Los Angeles) that took 12 hours to assemble. Her sister Ashlee was her maid of honor and her bridesmaids included childhood friends as well as her sister-in-law and the wife of one of Nick's best friends.
She was part of the USO tour in the 2003 Iraqi War (aka Desert Storm Part II).
She and her ex-husband Nick Lachey lived in Calabasas, California, which was also the location of their show "Newlyweds: Nick & Jessica" (2003).
Was picked as #1 on "Maxim" top 100 hot list for 2004.
Made the tabloid headlines after attending a bachelorette party for friend Jennifer MacFarlane, where the entertainment was provided by two members of the "Genital Origami" troupe Puppetry of the Penis. She reportedly "howled and giggled" at the duo's routine, which included such installations as "The Fruit Bat" and "The Turtle." (November 2004)
Underwent LASIK eye surgery to correct her vision (2004)
A registered Republican who voted for George W. Bush in 2004 and John McCain in 2008.
Beat out Britney Spears, for the role of Daisy Duke, in the upcoming movie, The Dukes of Hazzard (2005).
Named #9 on the Maxim magazine Hot 100 of 2005 list.
Named #16 in FHM's "100 Sexiest Women in the World 2005" special supplement. (2005)
She won a People's Choice Award for Favorite Song From a Movie "These Boots Are Made For Walkin" from the movie, The Dukes of Hazzard (2005) on January 10, 2006 at the 32nd Annual People's Choice Awards (2006).
One of People Magazine's 50 Most Beautiful People (2005).
Was voted #1 in People Magazine's 10 Most Stylish Moments for her "Daisy Duke" look. [September 2005]
Was nominated for the 2006 Razzie Award for Worst Supporting Actress along side her sister Ashlee 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.
Won the Teen Choice Award for Movies - Choice Breakout (Female) for (The Dukes of Hazzard) on August 20, 2006 from Universal City, California, USA.
Named #4 in FHM magazine's "100 Sexiest Women in the World 2006" supplement. (2006).
Ranked #41 on the Maxim magazine Hot 100 of 2007 list.
In 2007 when she was the girlfriend of Dallas Cowboys quarterback Tony Romo, she appeared up in the Cowboys' stadium luxury box during a December game against the Eagles. She was wearing a pink Cowboys jersey with Romo's number. Unfortunately this did not help Romo as he had his worst game of the season, throwing three interceptions in a 10-6 loss. This lead many Cowboys fans to speculate that she was a distraction, calling her Yoko Romo.
Ranked #53 on the Maxim magazine Hot 100 of 2008 list.
Was hospitalized for five days with a kidney infection [March 31, 2008].
Had a dog named Daisy (a malti-poo), which was a gift to Jessica from Nick Lachey, until Daisy was snatched and killed by a coyote in September of 2009.
[July 9, 2009] Split from Tony Romo a day before her 29th birthday.
Engaged to Eric Johnson [November 14, 2010].
Spokeswoman for the "Beauty Mint" skin care system [November 8, 2011].
Gave birth to her 1st child at age 31, a daughter Maxwell Drew Johnson on May 1, 2012. Child's father is her boyfriend, Eric Johnson.