Jennifer Aniston turns 41 today (even though she celebrated the occasion last weekend with Gerard Butler). The woman who could have been a heartbeat away from becoming president, still thinks she has a chance in 2012, and whose name we cannot even type without feeling nauseous, is turning 46. Sheryl Crow is 48. Brandy is turning 31. Mr. Burt Reynolds will be blowing out 74 candles on top of his cake today. Kelly Rowland is celebrating her 29th. Actress Carey Lowell is 49. Legendary British fashion designer Mary Quant is 76. Former Florida Gov. Jeb Bush is turning 57. The always classy Aubrey O'Day turns 26. And Twilight actor and tween hearthrob Taylor Lautner turns 18 today.

• Does Lindsay Lohan have a beef with Taylor Momsen? At the G-Star show on Tuesday night, LiLo (with sister Ali in tow) refused to pose for pics and then started casting aside seating cards for celebs like Juliette Lewis, Christian Siriano, and Gossip Girl emo teen Taylor Momsen. When event staff intervened, Lindsay got all aggro and dropped an F-bomb, naturally. But give the girl a break. She was apparently just trying to position herself near her crush, True Blood’s Ryan Kwanten. [P6, NYDN]
• At the G-Star after-party at the Bowery Hotel later that night, Mischa Barton was a little unsteady on her feet and was slurring her words. She then hit the DJ booth, where she "danced in her own world" for an hour. [P6]
• While other celebs were at Fashion Week, Chris Brown rocked a neon orange vest over, quite appropriately, a wife-beater, back home in Richmond, Virginia. He started his year-long community service for assaulting Rihanna by picking up trash and cleaning police horse stables. Next up, graffiti removal and washing cars! [Us, NYDN]

Lindsay Lohan tried to pull rank on Taylor Momsen — and failed. Megan Fox successfully summed herself up. And Princess Margaret burned Princess Diana. Oh, yeah! It's your Thursday morning Gossip Roundup!

Twitter's all about self-promotion. This we know. MC Hammer knows that, too, and apparently has been quite successful at it, which explains why Gravity Summit invited him to keynote this week's social media conference at Harvard.

It's a day that tabloids have been counting down to for months now—Jennifer Aniston turns 40 today. Others celebrating: Sarah Palin is 45. Jeb Bush is 56. Sheryl Crow is 47. Brandy is turning 30. Kelly Rowland is celebrating her 28th. Carey Lowell, the actress and wife of Richard Gere, is turning 48. BMG chief exec Barry Weiss is 50. IAC's Michael Jackson is 51. Interior designer Kitty Hawks is 63. British fashion designer Mary Quant is 75. Aubrey O'Day is celebrating her 25th. And Burt Reynolds is 73.

Showing an uncultivated lack of reverential appreciation for Cannonball Run, Smokey and the Bandit, Without A Paddle, and the rest of Burt Reynolds' timeless oeuvre, the Jupiter Town Council is attempting to evict the Burt Reynolds & Friends Museum from the location it's held since 2002:

Salon reports that the mustache is back. They've been spotted all over LA and are presumably threatening to migrate east. They're also starting to appear on celebrities who are not Tom Selleck, Burt Reynolds, or Ron Jeremy. [Ed. notePlease God, no.]
The 'stache is back [Salon]

Vanity Fair's Nina Munk is following the AOL/TW saga in preparation for a book. If it's optioned for film, Munk's casting choices are as follows: "Peter Gallagher as Bob Pittman; Burt Reynolds as Ted Turner; Dustin Hoffman as Gerald Levin; James Earl Jones as Richard Parsons; and either Michael Douglas or Kiefer Sutherland (with his hair darkened, presumably) as Steve Case."
Eyeing media [IWantMedia]