Macaulay's Sister Dies  —  We've learned Macaulay Culkin's sister died yesterday after being struck by a car.  —  Law enforcement sources tell us Dakota Culkin was walking on the west side of Los Angeles Tuesday when she stepped off a curb and was struck by a car.

Usher Welcomes Baby No. 2  —  Usher and his wife, Tameka  —  It's a boy - again!  —  Sources confirm to PEOPLE that Usher and his wife Tameka have a new addition to the family: a baby boy born on Wednesday.  —  The new Raymond (whose name has not yet been released) joins older brother Usher Raymond V, who turned 1 on Nov. 26.

Paltrow hoping to save marriage to Coldplay's Martin  —  Gwyneth Paltrow is desperately trying to save her troubled marriage.  —  Amid recent reports of their rocky romance, Paltrow and her husband, Coldplay rocker Chris Martin, are holed up in their London home “trying to make their marriage better …

EXCLUSIVE: KATE WALSH'S HUSBAND FILES FOR DIVORCE  —  ET breaks news that “Private Practice” star Kate Walsh's husband Alex Young has filed for divorce from the actress.  ET was first to obtain the divorce filing.  —  In divorce papers, Young cites irreconcilable differences as the reason for the split.

Jennifer Aniston poses nude with just a necktie in her most provocative shoot ever … Posing provocatively in nothing but a striped necktie, Jennifer Aniston has appeared in her most sultry photoshoot to date to grace the front cover of American GQ magazine.

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NOT OUR BABY  —  ASHLEE Simpson and Pete Wentz are trying to drum up some cash by selling photos of their baby, Bronx Mowgli - but so far, no takers.  A celebrity weekly insider told Page Six, “Pete and Ashlee have approached every single celebrity magazine with offers to sell their first photos, but nobody wants them.

Is that dress REALLY supposed to look like that Lily or did you fall out of the Nobu broom cupboard? … Lily Allen may well appear to be scratching her head after she was seen leaving her favourite restaurant Nobu, in Central London last night.  —  But it was her unusual choice of dress …

Aubrey O'Day All Wet And On Her Knees  —  Well, if these aren't the most appropriate pictures of Aubrey O'Day I've ever seen, then I don't know what are.  It's Aubrey sopping wet, and on her knees in some behind-the-scenes pictures from her Complex magazine photoshoot (you know, the one where Aubrey O'Day was topless).

Mark Ruffalo Drops Out of Movie  —  Mark Ruffalo dropped out of the dramatic feature film, Greenburg, and will be replaced by Ben Stiller.  —  It is unclear why Ruffalo — whose brother, Scott Ruffalo, passed away late Monday from a self-inflicted gun shot wound to the head — backed out of the project.

EXCLUSIVE: Britney's Christmas Message  —  Check out our EXCLUSIVE Christmas message from Britney.  How cute are Jayden and Sean Preston?  Adorable!  —  Jen, Britney's British Bitch

Alyssa Milano Because I was Wrong  —  I'd like to make an apology to Alyssa Milano.  When she first came out with the idea of making a women's sports team clothing line I never thought it would work.  I even went so far as to make fun of it.  But 2 years later it's still going strong, and I'm man enough to admit I was wrong.

Kate Winslet and Leonardo DiCaprio: EW's Exclusive Reunion Q&A!  —  More than a decade ago, they stepped aboard “Titanic.”  They've finally reunited for “Revolutionary Road,” and this time it's a marriage that hits an iceberg.  A surprising talk with two true friends.  —  PHOTOGRAPH BY BRIGITTE LACOMBE