Jessica Simpson posed with pal Cacee Cobb in a new Instagram shot that shows off her cleavage and weight loss. Credit: Courtesy of Cacee Cobb

Girl's night! Jessica Simpson and bestie Cacee Cobb had a fun night out on Saturday, May 24. The pair snapped a picture together, which Cobb posted on Instagram with the caption "Bosom Buddies." 

The description is particularly appropriate, considering fashion designer Simpson is showing off her ample cleavage in the pic. 

The Weight Watchers spokeswoman, 33, looks trim and sexy in the shot, wearing a black and white fitted dress with her hair down and no visible jewelry. 

Simpson recently celebrated her four-year anniversary with fiance Eric Johnson, and has been preparing for her upcoming wedding to the former NFL player. 

"Happy 4yr anniversary, baby!!" she wrote alongside a picture of them kissing on May 21. "I am so honored to be the mother of your babies and loved by you every moment."