Photos of Jessica Simpson In A Bikini And Coverup At Ashlee Simpson's Birthday Party in Vegas

Jessica Slips on a Bikini For Ashlee's 25-Year-Old Pool Party

Jessica Simpson wore all black on the red carpet at Operation Smile's annual gala in Beverly Hills on Friday night before jetting off to Vegas to celebrate Ashlee's 25th birthday on Saturday. Ashlee stayed playful with Pete Wentz at the MGM Grand pool, kissing for the cameras in front of her towering cake — see her look. Ashlee was only in Sin City for the day before she had to get back to Bronx in LA, but she did gush about her week on tour with Pete and one of his gifts, a pair of Chanel shoes. Jessica posed in her sheer bikini cover-up showing off her legs and a messy 'do. She has been all over the world recently for The Price of Beauty with her dad along for the journey and he says that he's proud of her work on the show. Next up they're off to Morocco while Ashlee is back in California at work on Melrose Place.

To see more of Pete, Ashlee and Jessica just read more.

Source:, WireImage and Getty