A "rock solid source" says B is knocked up. Jesse James' fourth mistress comes forward. Remember when Sandra said, if he cheated, she'd beat him with a baseball bat? Heidi Montag works on a screenplay about 3-D boobs. TGIFriday gossip.

  • A "ROCK SOLID source" says Beyonce is pregnant and "Jay Z is EXTREMELY happy" to be having a kid with her. A rather shaky claim, particularly because "Beyonce is doing fine and resting," and do women really do that? They see two lines on the pee stick, and suddenly they cannot walk and must lie down and fan themselves for days on end? Beyonce's publicist wouldn't comment as a matter of principle, so it could be true, even though she said in February she wasn't doing the baby thing any time soon. As for the source, Celebitchy suspects Kanye West on account of the caps lock use. [MTO, P6, Celebitchy, Pic of Beyonce-Alicia Keys music video set via Bauer-Griffin]
  • Jesse James Mistress #4 comes out of the woodwork, has lawyer to the starfuckers Gloria Allred on speed dial. (Rachel Uchitel, is that you?) "I represent a beautiful model and businesswoman," says Allred. "She had a three-year intimate relationship with Jesse James. .... The relations JUST RECENTLY ENDED after the scandal broke." Hollywood Life takes this moment to remind us that, when the Tiger-Elin golf club battle first broke, Sandy said "I would have kept hitting. ... I'd get the baseball bat; I'd get everything out." [Radar, Hollywood Life]
  • Speaking of Dirt Dog James, yesterday he text messaged Mistress #2 (his other tattooed stripper lover). It said, "I'm angry at you and disappointed you'd do this," referring to her blabby mouth. Obviously, this message got blabbed, too. [Radar]
  • Heidi Montag is working on a screenplay. "I am making the first 3-D beach comedy about a shark that attacks a small beach town and I save the day with my 3-D boobs. I've even written a role for Dolly Parton to play the town mayor!" Hmm. That might actually work. [TVWatch]
  • Speaking of the Heidi-Dolly connection, the Grand Dame of DDDs has weighed in on the most urgent matter of Heidi's rack, and she's for it: "Oh, I would have probably done it when I was that age if I could have afforded it and thought I needed it," said Dolly. [Celebitchy]
  • Tiger Woods shot a new commercial for Nike at his neighborhood golf course. Nike: Remarkably Athletic in Spite of a High Risk of Sexually-Transmitted Disease [TMZ]
  • Michael Lohan is pitching a Simple Life-esque reality show: "Celebrities including Jon Gosselin's ex-girlfriends who would travel across the US in an RV." I can't quite comprehend what's going on here—Jon Gosselin isn't going to be part of it, just Hailey Glassman (the ex who made fun of his penis and communicated with knives) and Kate Major (the ex who was a Star reporter)? Don't these people all have restraining orders against each other? [P6]
  • Foo Fighters frontman Dave Grohl drank to much coffee and had to be hospitalized for "chest pains." This is what happens when rock stars grow up: They drink to excess and have overdoses, but different ones. [P6]
  • Speaking of aging rockers: Axl Rose is facing a $1.9 million lawsuit from his manager over commissions. Apparently he made "more than $12 million... for performances abroad." Axl says he can't pay because he spent it all on wild Starbucks-analias with Dave Grohl. [AP]
  • Want to see Madonna's boyfriend's nipples in 3-D? Hope you've got some red-blue spectacles handy. [SocialiteLife]

[Photo via Getty Images]