Celebs in Denim: Ashlee in J Brand, Pete in Diesel by Liane May 8, 2008, 7:32 am 93 Views 2 Comments These two sure are loyal to their jeans, aren’t they?! Once again, Ashlee Simpson was spotted in her trusty J Brand skinny jeans and Pete Wentz of Fall Out Boy in his black Diesels. Aww, celebs in designer denim love. Celebs in Denim: Ashlee Simpson in J BrandPete Wentz in Diesel See more Previous article Who wears short-shorts? We wear short-shorts! Next article EXCLUSIVE: Paige Premium Denim introduces Paige Black Label! 2 Comments does anyone know what brand her boots are? I love em! Hollister boy in Diesels. How ironic. It’s like a Toyota with a GM engine.