Jessica Simpson's Body Looks Amazing in One-Piece Swimsuit

Jessica Simpson shows off her absolutely amazing figure in a one-piece swimsuit in this photo posted to her Instagram account.

“Oh yea girl…We are proud to be in our bathing suits!! @baylormcg #hardworkpaysoff #workoutpartnersforlife,” the 34-year-old entertainer captioned the photo. Her body is out of this world!

PHOTOS: Check out the latest pics of Jessica Simpson

Jessica was celebrating her younger sister Ashlee Simpson‘s Bachelorette weekend.

“All the beauties celebrating @ashleesimpsonofficial / @missbananahammock!!! I love you Ash :),” Jessica captioned a photo of the whole group of ladies at the party.