Jessica Simpson is jealous of her sister ASHLEE's amazingly toned physique and insists she has no idea how she can look so good when she eats so many sweets.
Although she admires her sister's figure, Jessica claims there is no sibling rivalry between the two because they have vastly different body types.
She explains, "Her body is so sick (hot) right now! She's like this little surf girl with the most perfect boobs and the skinniest legs.
"I have no idea how she looks so good. She's addicted to sugar!"