John Mayer performs "Heartbreak Warfare" on Jimmy Kimmel.

Leonardo DiCaprio, Ed Norton and more star in clean energy PSA.

Viewers rate worst Super Bowl ads.

Cookie Monster sings "S is for Snooki"....NOOOOOO!!!

CNN interviews Kristen Bell, Josh Duhamel & Dax Shepard about "When in Rome".

Taylor Swift's Grammy weekend.

Video: Gorgeous Alyssa Milano signs autographs & takes pictures with her excited fans.

Video: Cat fights off bear!

"The View" women discuss having dogs in bed.

Channing Tatum talks about love and being dumped in the 8th grade.

The Kardashian clan surprise Ryan Seacrest.

Robert Pattinson becomes a comic book star.

John Travolta and Kelly Preston talk about him being bald in his latest flick.

Dave Matthews and Green Day rehearse for Sunday's Grammy Awards.

"Funny Or Die Presents" HBO Trailer starring Will Ferrell, Zach Galifianakis, Zooey Deschanel & more.

Dax Shepard reveals he almost died when filming "When in Rome" starring Kristen Bell.

Drunk woman arrested after she tries to take her baby into a bar.

MADtv stars discuss their 2005 iPad parody sketch that has HUGE new life.

"The Good Guy" trailer starring Alexis Bledel.

Katie Holmes is interviewed about her new film, "The Romantics".

Tara Reid shows off her engagement ring.

Elizabeth Hasselbeck trades places with football analyst husband.

Video: The first four minutes of the "Lost" season premiere!

Preview of "60 Minutes" segment on Beyonce.

Rihanna talks to Ellen Degeneres about dating.

Barney attacks "American Idol".

Kristen Bell and Josh Duhamel joke and have fun at the "When in Rome" premiere.

Bill Gates talks about philanthropic giving.

Katie Holmes and Suri Cruise look adorable in red.

Jimmy Kimmel responds to Jay Leno telling Oprah that Kimmel "sucker punched" him.

Jesse James is determined to get his beloved dog back.

Howie Mandel predicts Piers Morgan will hate him.

Pregnant Tila Tequila looks amazing while shopping. Paparazzi idiots talk smack behind her back.

Dax Shepard gushes about Josh Duhamel's looks at the "When in Rome" premiere.

Woman stabs & burns her boyfriend after he switched "American Idol" off.

Jon Voight calls Brad Pitt and Angelina Jolie breakup rumors "nonsense".

Pee-Wee Herman gets an iPad.

Kristen Bell, Josh Duhamal & Dax Shephard talk about Dax's 6-pack in "When in Rome".

Could Magneto beat Gandalf?

James Franco has a "soap stare" contest with repoter.

Kim Kardashian tweets hot bikini pics.

"Wall Street: Money Never Sleeps" trailer.

5 things you need to know about "Cougar Town".

Sexy Rose McGowan is a vision of beauty at the "When in Rome" premiere.

Couple celebrate their 81st wedding anniversary. Wow!

Joy Behar talks about Snooki refusing to meet Jerry Springer... because she claims to be too classy for him.

Mariah Carey's naughty radio prank.

"Big Bang Theory" star Kaley Cuoco talks about her crush on Stan Lee.

Tell-all book features details on John Edwards' affair and alleged sex tape.

"Mad Men" star Jon Hamm's SNL promos.

Brooke Hogan talks about being comfortable with her body.

Josh Duhamel talks to CBS about "When in Rome".

Mary Lynn Rajskub is interviewed about "24".

Bar Refaeli's sexy rampage.

Jimmy Kimmel presents the iPants.

Ozzy Osbourne talks sex, drugs, rock and roll.

Neil Patrick Harris clashes with Simon Cowell on "American Idol".

Samuel L. Jackson says "Maybe I am in Thor".

Mom leads cops on car chase....with her kids in the car.

Julianne Moore and cast of "The Kids Are All Right" are interviewed at Sundance.

Kristen Stewart walks away from a reporter who asks if she is "Team Edward" offscreen. I LOVE HER!

HBO's "Temple Grandin" trailer starring Claire Danes.

Ryan Gosling and Michelle Williams are interviewed about "Blue Valentine" at Sundance.

Nancy Grace doesn't want her deposition in wrongful death trial to be on TV.

Jay Leno talks to Oprah about Conan O'Brien.

When can you get the iPad?

A violinist who survived the Haiti quake gets a surprise from Stevie Wonder.

Kristen Stewart talks to MTV about her nude scene in "The Runaways".

Dennis Quaid talks about his upcoming role as Bill Clinton.

Jay-Z backs Broadway show.

Susan Boyle confronted by intruder in her home.

Kristen Bell & Josh Duhamnel talk about their chemistry in "When in Rome".

Jeremy Piven says he and "Mad Men" beauty January Jones are just friends.

Stan Lee gives his thoughts on the Spider-Man revamp and "Iron Man 2".

MIchael C. Hall says awards for his "Dexter" role, inspire him in his cancer fight.

Cutie Kristen Bell talks to Jimmy Kimmel about being deathly sick and her new flick.

"American Idol" contestant hits on Simon & Ryan and insults Katy Perry.

Enron the musical hits the UK stage...and is a smash.

Kristen Stewart, Dakota Fanning & Joan Jett attend "The Runaways" premiere at Sundance.

Joy Behar and her panel discuss Conan O'Brien's rumored move to FOX.

Tori Spelling and Dean McDermott star in great toilet paper spoof.

Josh Duhamel talks about renewing his wedding vows with Fergie.

Dog has a litter of 17 puppies.

Dominos pizza's ad campaign: Ya, our old pizza stunk for 50 years. Hey, try our new pizza!

Charlie Sheen's wife is released from the hospital.

Angelina Jolie and her brother release a tribute video for their Mother.

Too funny! Ryan Reynolds refuses to recite the Green Lantern oath for MTV.

Kate Walsh Fears the Apocalypse

Director Jonathan Demme talks about his passion for Haiti.

"Castle" ratings hit all time high.

Carrie Underwood and her future NHL hubby have that "love glow".

Ayla Brown talks to CBS about her father Scott Brown, her new CD & "American Idol".

Video: Woman passes out on "The Price is Right"

Katie Holmes dazzles crowds at her Sundance film premiere.

Conservatives attack "Avatar".

Adam Lambert dishes on his re-done look.

Michael Cera plays Taboo with Jimmy Fallon.

Massive hockey brawl involving......nine year old kids.

Is Rosie taking over for Oprah?

John Travolta and Kelly Preston use their plane to personally bring aid to Haiti.

PETA member unleashes pie to the face to protest seal hunting in Canada.

Madonna talks to CNN about her effort to help orphans in Malawi.

Video preview of Julie Benz's debut on "Desperate Housewives"!

Victoria's Secret Angels get hot in winter.

Cate Blanchett promotes cosmetics in Tokyo.

Full "Castle" episode starring Nathan Fillion with guest star hottie Sarah Brown.

Ryan Gosling says he tried to distract his Mom, as they watched the love scenes from his latest movie.

Kristen Stewart says it was cool kissing Dakota Fanning.

Philip Seymour Hoffman is interviewed about 'Jack Goes Boating' at Sundance.

James Franco says Tobey Maguire is the best Peter Parker around.

Khloe Kardashian meets President Obama.

Joan Jett rocks Sundance.

Kristen Stewart and Dakota Fanning talk about their kiss in "The Runaways".

Justin Timberlake and Cameron Diaz are friendly. Are they getting back together?

Scarlett Johansson scores rave reviews for her Broadway debut.

Jennifer Aniston donates $500,000 for Haiti relief.

Mel Gibson talks about his return to the big screen after 8 years.

"Survivor: Heroes Vs. Villains" preview with Jeff Probst.

Just awful. Nancy Kerrigan's brother charged in Father's death.

President Obama meets Kobe Bryant and the Lakers.

Tom Cruise proves he still has it, as he performs a cool stunt for a new flick.

Fans are beside themselves as Lady Gaga arrives at Radio City Music Hall.

Gary Coleman's latest mug shot revealed.

Adrian Grenier discusses his documentary, 'Teenage Paparazzo.'

Sting talks about playing with the Philadelphia Orchestra.

Video: Jay Leno laughs off his feud with David Letterman.

Is there any truth at all in the Oprah book getting big buzz?