Lindsay Lohan was turned away from a party. A Matt Damon impostor. Lady Gaga's "drunk diet." Welcome to Saturday Gossip Roundup.

  • Above is what dejection looks like. Last night, Lindsay Lohan was turned away from a private party at the Sunset Marquis Hotel in Hollywood when security denied her entrance. "Lohan was cool about the brush off though and avoided making a scene although the situation was clearly embarrassing," writes Radar. How Lindsay has fallen since getting sober! It makes you think people used to invite her to parties just for the thrill of having a trainwreck around. [Radar]
  • Some guy pretending to be Matt Damon's publicist caused an uproar at Gwen Stefani's fashion show earlier this week when he tricked organizers into thinking Damon was coming. Instead, he was just trying to crash the show and Damon never showed up. Dozens of paparazzi went home disappointed that day. Apparently this guy has been doing this all over the country, including at an ESPN event. Mystery Matt Damon party crashing impostor: Reveal yourself! [P6]
  • Speaking of Fashion Week: Here were the stars who hung out the most at fashion week: Vanessa Hudgens, Kanye West, The Real Housewives of New York and New Jersey, Fregie and Gabrielle Union. [E!]
  • Paris Hilton and her hotboxing boyfriend Cy Waits were spotted ring shopping at Jacob & Co. She got a $25,000 black diamond ring. Not too shabby, considering Waits just bought her that $375,000 Lexus. You may not be able to buy love, but Waits is putting down a deposit just in case. [P6]
  • How Lady Gaga keeps slender enough to fit in her egg: "I am on the drunk diet. I live my life as I want to, creatively. I like to drink whiskey and stuff while I am working. But the deal is I've got to work out every day, and I work out hung over if I am hung over." See, all the booze changes how your metabolism works—it makes your cells drunk! This is the diet Dr. Atkins came up with when he was in college. [Popeater]
  • Jon Gosselin is now installing solar panels for a living. Ha, it's going to take a lot of solar panels to make up for the environmental damage you've caused by bringing eight carbon-spewing babies into the world. Might want to start working on an electric car or something. [E!]
  • What happened to Kristen Stewart's arm? She has a cast on it for some reason. She's filming Breaking Dawn, so it is probably a a pining-related injury. [Radar]
  • Did you get your British royal wedding invitation? We didn't either. But they're apparently "in the process of being sent out," according to People. So we're just going to start checking our mailbox every 10 minutes. Queen Elizabeth owes us a favor, so if we're not invited we will be soooo pissed. [People]
  • You may now listen to audio of the 911 call that resulted from Frankie Muniz and his girlfriend's epic fight, during which he allegedly held a gun to his own head. "I don't want to make a big deal because I am a celebrity," he tells the operator when asked his name. Somehow, these two are still together. [Radar, People]

[Image via Pacific Coast News.]