Jessica Simpson: Happy Birthday Ashlee!

Jessica Simpson and sister Ashlee Simpson pose together at the Wet Republic pool at the MGM Grand Hotel/Casino to celebrate Ashlee‘s 25th birthday on Saturday (October 3) in Las Vegas, Nevada.

The 29-year-old singer’s dad, Joe Simpson, recently spoke out about the weight criticism Jessica received earlier this year. “She’s always scrutinized by the world and [it's great] to watch her go to other countries and see women talk about what is beautiful there,” Joe told US Weekly. “We were just in Uganda, and a beauty ambassador [there] knew Jessica‘s total story about her weight and blah, blah, blah. [She said] to Jessica that it’s about who you are inside, which is the message of our show.”

20+ pictures inside of Jessica Simpson celebrating her sister Ashlee’s 25th birthday…