"Us Weekly" says that JESSICA SIMPSON is pregnant again.  A source says, quote, "It definitely wasn't planned."  (--Maybe after she lost all that weight, her husband couldn't keep his various appendages off her?)

--If this is true . . . and no one has officially confirmed it yet . . . there's no word what it'll do to her Weight Watchers deal.  A company spokeswoman would only say, quote, "Any questions related to Jessica's personal life can only be answered by her team."

--Meanwhile, Jessica's rep says, quote, "I'm not going to comment on this speculation."  (--Jessica's daughter Maxwell was born only seven months ago.)