Warning: if you don't like listening to screaming teenyboppers, don't play to the first few seconds of this video on full volume, but if you want to see what a sweetie Charlie St. Cloud star Zac Efron is, definitely watch this!

Not only did Zac take the time to sign numerous autographs on the way in to the Jimmy Kimmel Show last night, but on the way out he posed for pictures and signed even more autographs for his adoring fans. Awww, even though he might have gotten frisky with some strippers the other night, he's obviously one of the nicest guys in Hollywood!

Chris Klein will be extending his stay at the Cirque Lodge in Sundance, Utah. His rep released the following statement to X17online: "Chris, along with his support team, has decided to extend his treatment. He is doing fantastic and is optimistic about his future. He thanks everyone for their continued support."

It is not known how long the American Pie actor will remain at the rehab facility, where he has been since July 21st following his 2nd DUI arrest on June 16th, where his blood alcohol level was found to be nearly three times the legal limit.

Think his extended trip to rehab will help convince the judge he's serious about his sobriety?

Yesterday we snapped pop diva Christina Aguilera arriving at a friend's house in Beverly Hills, and she was rocking a graphic tank with a large set of lips. How appropriate! She may have the voice, but given her dislike for coughing during interviews and other petty things, we know she's got the mouth to match. Hmm, maybe she's just poking fun at herself?

Eva Longoria stunned in a basic black dress outside of the Hollywood Foreign Press luncheon in Beverly Hills yesterday.

Eva joined Nicole Kidman and other celebs to welcome the new HFPA members. You know, the ones who vote on the Golden Globes?

Eva's only been nominated once before for Desperate Housewives in 2004 -- but maybe next year she'll finally win!

Vanessa headed into rehearsals for her debut as Mimi in RENT at the Hollywood Bowl next week, looking just as gorge in a scarf and sweats as she does on the red carpet!

THAT is why Vanessa is one of our favorite fashion crushes (we even made a little video about it!)

We can't wait to see her kill it on the stage of the Bowl.

Nicole Kidman was positively glowing in a green dress at the Four Seasons hotel in Beverly Hills for a Hollywood Foreign Press luncheon.

Kidman, who has won three Golden Globes, was on hand to introduce the newly elected HFPA board members.

Not a bad gig for a working actress! We're not saying she needs it -- but meeting all the new members may give her a leg up on the competition!

We already showed you the super cool behind the scenes footage of Madonna and her 13-year-old daughter Lourdes styling Gossip Girl actress/rock star Taylor Momsen for their Material Girl clothing line, and here's the first pics from their photo shoot!

Not only do Lourdes and Madonna have input on what Ms. Momsen wears, but the Queen of Pop even got behind the camera for a few shots. Can't wait to see the rest of the apparel and ads that will be coming out this fall!

Hot stuff comin' through! Reality TV starlet Kim Kardashian hit up Madison on Melrose yesterday afternoon in a gold top, white shorts and a smile. So fetch!

And she just Tweeted today that she grabbed a "peanut butter and banana BodyFactory smoothie" after her workout - my personal fave!