Most Watched Newlyweds: Jessica and Nick

N E W   Y O R K, Nov. 22 -- Jessica Simpson admits that some of her antics on Newlyweds: Nick and Jessica — a reality show featuring Simpson and her husband Nick Lachey — can be classified as ditzy, but she says she is certainly not stupid.

Jessica Simpson says she doesn't mind being classified as a blonde "ditz" — but she certainly doesn't consider herself to be stupid. And it's unlikely that anyone who knows about the recent spike in her celebrity status would call her stupid either.

Simpson and Lachey just signed on for a second season of MTV's Newleyweds. The hit show has transformed the pop singer, who was once only well-known in the world of teeny boppers, into a household name.

Simpson quickly became America's favorite ditzy blonde when she revealed her confusion about tuna fish and Buffalo wings on the show.

In the infamous episode she asks Lachey, "Is this chicken, what I have, or is this fish?" as she digs into a bowl of tuna salad. "I know it's tuna, but it — it says Chicken by the Sea."

Lachey looks incredulous and says nothing.

In another episode, Simpson reveals that she believed Buffalo wings were really made of buffalo meat, and not chicken.

"I am ditzy and I am clumsy," Simpson, 23, says. "I will walk into a room and fall on my face. That's how I have always been. I'm not dumb," she said.

Lachey, 30, says he's never surprised when watching the shows, but he does like to play the moments over again, in order to teach his young wife a lesson or two.

"I will be the first to tell you, those kinds of moments happened long before there was ever a camera in our house," Lachey said, discounting rumors that his wife's gaffes were staged for the show.

The tuna incident garnered so much attention that it led to talks with Chicken of the Sea about the possibility of a spokeswoman deal.

"I need to be a mermaid on a can," Simpson said. "I don't think I ever got more publicity on one thing."