There's no sibling rivalry between Jessica Simpson and Ashlee Simpson! In fact, the fashion mogul couldn't have chosen a more stunning photo of her her younger sister to post on her 30th birthday Friday. In the ethereal wedding-esque picture of a picture, Ashlee looks flawless in a lacy dress with her hair in braids. Jess writes sweetly, "Happy Birthday Ashlee! There is no one I believe in more than you. Thank you for inspiring me everyday. I love you!!! #dirty30." Ashlee and Jessica both have a lot to celebrate these days! Ash said "I do" to love Evan Ross in August, and Jess married Eric Johnson in July.