Jessica Simpson's 'Entourage' cameo is about her dog Daisy! Sad.

Jessica Simpson is guest-starring as herself on an upcoming episode of "Entourage." In the clip above, she gives agent Ari Gold ( Jeremy Piven) the brush-off as he tries to sweet-talk her with a new fluffy, black puppy, which is not a Maltipoo, "it's just a poo."