Gwyneth humiliated  —  Star Magazine is definitely not the most trustworthy source.  Most of it is bullsh-t.  But this is a story that cannot be ignored.  The new issue of Star Magazine includes an explosive allegation - Chris Martin cheated on Gwyneth Paltrow with Kate Bosworth.  Yes.  Her again.

Kirstie Alley Tackles Her Weight in New Reality Series  —  Kirstie Alley is ready to get real about her weight struggles.  —  The actress, 58, has signed on to star in a new reality series for A&E, which will follow her as she juggles trying to lose weight with life as a single mom to two teenagers in Hollywood.

Celebrity Photographer Dies At Lady Gaga Event  —  Celebrity shooter A.J. Sokalner, admired by his colleagues for his quiet, passionate commitment to photography, collapsed Monday night outside an event in New York and died a short time later, according to his agency.

EXCLUSIVE: Sean Penn's Son Arrested At School  —  Sean Penn's 16-year-old son, Hopper Jack, was arrested sometime last week, according to two sources near the investigation who spoke exclusively with RadarOnline.com.  —  The younger Penn was taken into custody by the L.A. County Sheriff's department.

Mariah Carey Takes a Tumble on ‘Leno’  —  Oh, the trials and tribulations of high heels.  Mariah Carey almost went face-first into Jay Leno's stage during a taping of his show on Monday night, thanks to some iffy footwork by the crooner.  As Carey was making her way onto the stage …

Kate Gosselin: I Was Wrong to Treat Jon That Way  —  Loading...  The Kate-Gosselin-Sets-It-Straight train rolled into Remorseland today.  —  The reality-TV star whose show has been postponed out from under her admits in her latest interview that she isn't proud of the Jon & Kate Plus 8 moments …

Rihanna Breaks Silence About Chris Brown  —  Diane Sawyer and Rihanna  —  Nine months after her fight with Chris Brown, Rihanna finally opens up about the night that left her bruised and bloody.  —  “This happened to me. ...  It can happen to anyone,” the singer, 21 …

Kate Winslet Wins Lawsuit After Being Labeled 'World's Most Irritating Actress'  —  Don't call Kate Winslet “the world's most irritating actress,” or you'll end up owing a lot of money.  —  The Oscar winner successfully sued British tabloid The Daily Mail after the publication gave …

Ben Stiller & Robert Downey Jr Turn Down Oscar Hosting Gig  —  The Academy of Motion Picture Arts & Sciences' newly selected producers Adam Shankman & Bill Mechanic went to Ben Stiller and Robert Downey Jr and asked them to host as a duo.  It would have been a killer combo.

“Brad Pitt Looked Awesome in My Costume!”  Says Nick Jr. Star  —  The verdict is in on Brad Pitt's 2009 Halloween getup: awesome!  —  Along with partner Angelina Jolie and four of their six kids, Pitt went trick or treating Oct. 31 in a residential area near the Hollywood Hills.

Kiefer Sutherland's $700 Morning Bar Tab  —  Kiefer Sutherland racked up the following $700 bar tab between 7am and 1pm.  Yes, those times are correct.  —  We've learned the “24” star and members of the show's crew popped into The Spot in San Pedro, California last week after wrapping up a shoot nearby …

Prejean/Miss California USA Breast War Ends  —  Carrie Prejean and the people behind Miss California USA have dropped their lawsuits against each other — meaning the “biblically correct” beauty queen doesn't need to reimburse the pageant for her boob job.

Carrie Underwood on Mike Fisher: It's Love  —  Carrie Underwood may sing about heartbreak, but in real life she's found love with boyfriend Mike Fisher, giving the hockey player a shout-out on the liner notes of her new CD, Play On.  —  “Thank you #12,” she writes in the notes, referring to the Ottawa Senator player's jersey number.

Robert Pattinson, Kristen Stewart Spent Night at Chateau Marmont  —  Friends with benefits?  —  Days after Vanity Fair released an interview with Robert Pattinson in which he declared he was just “friends” with Kristen Stewart, the two spent the night together at Hollywood's famed Chateau Marmont …

Major Death Revealed: Heroes Is Killing Off Adrian Pasdar  —  As I have been teasing for weeks, Heroes is killing off a major character later this season.  —  The death is a huge twist for the show so I didn't want to ruin the surprise for you, but now that another outlet has leaked the secret, it's time for me to reveal the truth:

Owen Wilson signs on for ‘Marmaduke’  —  Joins Judy Greer and Lee Pace in live-action/CG movie  —  Owen Wilson has signed on to voice the rascally Great Dane “Marmaduke,” Fox's adaptation of the long-running comic strip.  —  Wilson's boarding is the last piece of the puzzle for the live-action/CG movie …

Lifeline: Rihanna ‘woke up as Britney Spears’  —  Rihanna: I ‘woke up as Britney Spears’  —  Rihanna, a Glamour 2009 Woman of the Year, talks about how she coped after the Chris Brown assault in February and all the attention it caused.  “I went to sleep as Rihanna and woke up as Britney Spears …