Jay Leno and Conan O'Brien Turn on Each Other  —  The late-night barbs aren't stopping, and Jay Leno and Conan O'Brien have switched from making fun of NBC, to taking jabs at each other.  —  “Nobody knows what is going on.  Conan O'Brien, understandable, is very upset.  He had a statement in the paper yesterday.

EXCLUSIVE: Kate Gosselin Hates Her $7,000 Hair Extensions!  —  Hair today, tears tomorrow?  —  Kate Gosselin, 34, marked the new year by trading in her signature spiky bob for long, blonde locks in a process that took 20 hours of work and would normally cost $7,000 (hers was comped).

Lindsay Lohan braces herself for release of internet sex tape (as she makes uninhibited appearance in daring open shirt)  —  Lindsay Lohan may be fearful that an old sex tape is about to surface on the internet, but she put up a brave front last night.  —  The 23-year-old actress went bra-less …

Panic Over Heidi Montag Topless Photos  —  Moments after Heidi Montag's newest chesticular operation, her assistant went into full panic mode after a camera containing photos of Heidi's bare jumblies went missing during an ambulance ride.  —  It all went down in November as Heidi …

Elton and ‘American Idol’ - Is the Bitch Back?  —  So TMZ may have led the way in the search for Simon Cowell's replacement on “American Idol.”  —  On TMZ TV — the day Simon announced he was leaving — we floated Elton John as the guy who should take Simon's seat.

EXCLUSIVE: ‘Captain America’ & ‘JP4’ News  —  Joe Johnston's career blasted off big time when his first feature, Honey, I Shrunk the Kids, scooped up $130 million at the box office and was cemented in the pop culture as a Disneyland attraction.  Since then, he's had the luxury of following his instincts …

Jesse McCartney - No Nude Photo, Or Else  —  Jesse McCartney wants everyone to know ... if you publish a nude photo of him — even one that looks like him — he'll sue you.  —  The photo is floating around ... showing what looks like a naked McCartney all by his lonesome, laying on a bed with a candy G-string, fully exposed.

Sutherland wears dress on ‘Letterman’  —  Kiefer Sutherland donned a dress for his appearance on last night's instalment of The Late Show With David Letterman.  —  The 24 star joined Letterman on stage wearing army boots and a green patterned dress with a long-sleeved white shirt underneath.

Rep: Katy Perry Is Not Pregnant  —  Despite the rumors circulating online, Katy Perry is not pregnant.  —  The star's rep tells UsMagazine.com that reports claiming Perry — who got engaged to Russell Brand on New Year's Eve in India — was getting a sonogram and showing off a baby bump were “not true.”

Interview with ‘Pants on the Ground’ man Larry Platt  —  “Pants on the Ground” songmeister Larry Platt was “Idol's” gimmick du jour last night.  The producers gave Platt a platform to perform his song even though he was more than three decades too old to qualify for the show.  But they knew he was comedy gold.

Dexter's Michael C. Hall Has Cancer  —  Dexter actor Michael C. Hall revealed Wednesday he has been battling cancer, but said he's almost finished with treatment and the disease is in remission.  —  Hall, 38, said in a statement he is lucky to have been diagnosed with the …

George Clooney to Host MTV Telethon for Haiti  —  This is exclusive to this column: actor George Clooney is planning to host a telethon to raise money for the people of Haiti next Friday on all the MTV channels.  —  George told me last night at a private reception for his movie “Up in the Air” …

Brangelina Give $1 Million to Haiti Relief, Join Chorus of Worried Celebs  —  Brad Pitt and Angelina have pledged $1 million to the relief effort in the wake of devastating earthquakes in Haiti.  The Hollywood power couple are giving the huge sum to Doctors Without Borders …

Ask Ausiello: Spoilers on 'Grey's,' ‘House,’ ‘Glee,’ ‘Bones,’ and more!  —  Got a scoop request?  An anonymous tip you're dying to share?  Just want to say hi?  You can send any/all of the above to ausielloscoop@ew.com  —  Question: What's coming up for Sam and Addison on Private Practice?

The Bachelor's Bob Guiney and Wife Rebecca Budig Split  —  It looks like Bob Guiney is a bachelor once again.  —  The reality star — who became beloved as the jovial, self-effacing regular guy looking for love with Trista Rehn (now Trista Sutter) on The Bachelorette and then as the star …

Paramount eyeing ‘Four Brothers’ sequel  —  Mark Wahlberg will star; most of creative team to return  —  Paramount is developing a sequel to its 2005 thriller “Four Brothers,” bringing back many of the creative team for “Five Brothers.”  —  Mark Wahlberg eyeing a return to star and hatched …

‘Green Lantern’ announced one villain, but word is Jackie Earle Haley is playing Sinestro  —  Everyone's up in arms about “Spider-Man” this week, and I can understand why.  It's huge news.  But it's certainly not the only superhero film that's gearing up to shoot, and “Green Lantern” …

‘Gossip Girls’ gone wild at eatery  —  Certain cast members of “Gossip Girl” behaved exactly like the obnoxious, ill-tempered rich kids they play on TV at Philippe Tuesday night, according to a fellow diner.  —  Leighton Meester,  —  Ed Westwickand a posse of their pampered pals barreled …

This week's cover: James Cameron reveals plans for an ‘Avatar’ sequel  —  Categories: Avatar, Movies, This Week's Cover  —  Before it hit theaters, Avatar, which has amassed $1.3 billion at the worldwide box office, seemed to many in Hollywood like a crazy gamble.