Continuing to take her country act across the States, Jessica Simpson performed last night (September 20) during the Los Angeles County Fair in Los Angeles, California.

The "Do You Know" singer danced about the stage while belting out powerful vocals to a crowd that included her little sister, Ashlee Simpson, and her Fall Out Boy hubby, Pete Wentz.

Throughout Jessica's performance, Ashlee intently watched each and every move, taking pictures with her camera. Pete, however, didn't appear to be digging the country sound.

Speaking of Pete - he and his bandmates just recently offered up their sentiments to Travis Barker and Adam "DJ AM" Goldstein following their life-threatening plane crash.

Fall Out Boy's post reads, "Our band would like to reach out and put those who were a part of this tragedy and their families in our prayers, and as well our continued support for the recovery of those who survived. It's times like these that we are reminded - in the worst possible way - to honor life. Chris (Baker) was a rad (great) guy. He always had a way to get us to smile on tour, he was truly beloved."

Gossip Girls

Enjoy the pictures of Jessica Simpson performing last night (September 20), along with shots of Ashlee Simpson and Pete Wentz in the crowd.