She may have spent six years slaying vampires as "Buffy," but it seems Sarah Michelle Gellar has had to battle more demons off-screen than on.

"I have experienced first-hand and I know how lonely life — and it is not just Hollywood — can be," Gellar told Pop Tarts while promoting her latest crime/drama "The Air I Breathe."

"It's hard. You are constantly someone else and it is hard spending your life being someone else and projecting an image to really find yourself. It's tough."

Video: Pop Tarts Talk

Although Sarah plays a character called Sorrow in the new flick alongside Brendan Fraser, Andy Garcia and Kevin Bacon, she uses her star status to bring a starry smile to others.

During her travels as an ambassador for CARE to poverty-stricken places, the Tinseltown tiny experiences the exact opposite of sorrow when she wanders in war zones.

"When I travel to these remote places, I feel pleasure and happiness and helping these young girls — in America we are such a gluttonous society, and seeing the way these people appreciate everything is such an exciting time," she said. "Sorrow is when I come back."

But how does the wife of Freddie Prinze Jr. really feel about being named Maxim's 2008 Woman of the Year?

"It's so far removed. I was at the airport newsstand and people were looking back and forth and then went "Nah, it's not her" — but it is still a great honor," Gellar said. "And I get to lord it over my friends, which is fun."

Hiltons to Soon 'Chow' in Sin City?

Pop Tarts spotted the Hilton sisters indulging in those wondrous wontons at Mr. Chow's in Beverly Hills on Friday night, but we've been told that the gals will now be able to chomp on Chow's in a more "sinful" environment.

An insider has said that the cooking connoisseur to the stars (aka Michael Chow) has plans to open his famous dining digs in Las Vegas inside The Harmon Hotel Spa & Residences (to be operated in the MGM Grand).

Apparently, Chow plans to design the dim-sum hotspot himself, but no word yet whether his fave clients Paris and Nicky will be part of the promo process...

But just like the hotel chain she is heiress to, it turns out that Paris is anything but cheap. The "Simple Life" starlet is a regular at the trendy Optics by Victor in Beverly Hills, but every time she goes in for some fresh shades, she has problems making up her mind.

Apparently, the party princess practically ends up purchasing each pair she tries on — and who knew Paris also had problems with plastic.

"Ms. Hilton always pays cash — she just pulls out a stash of bills, which is scary," said a spokesperson for the store. "But she is one of the few celebrity clients that never ever asks for a discount — this girl is never cheap."

But it seems Paris won't say no to a free night on the town. The perennial partier and her sis Nicky (and Nicky's beau Dave Katzenberg) lounged around Les Deux in Hollywood on Wednesday night enjoying VIP treatment and of course, the finest drinks in the house.

Barrymore and Long Purr and Preen

Speaking of VIP treatment, Drew Barrymore and newbie boyfriend Justin Long were popped purring and preening while watching the Pussycat Dolls get down and dirty at their Lounge in Las Vegas on Wednesday night.

Cuddling and cooing in the VIP booth, eyewitnesses tell Pop Tarts that the off-screen sweethearts were so "into each other" that they barely remembered they were actually in Sin City to celebrate Long's little brother's birthday (Christian Long made an appearance in one of Justin's recent films, "Accepted.")

But baby bro didn't seem to mind, as he was still smiling (a lot) when the Dolls came over to mingle afterward. But as amazing as their performance was, there was one minor disappointment.

"We were hoping Drew would join them onstage," said a partygoer. "Especially seeing as though she was a guest Pussycat Doll in 'Charlie's Angels: Full Throttle.'"

Spears' Late-Night Shopping Spree

Surprise, surprise. Britney Spears got bored on Wednesday night and decided to blow $10,000 on goodies on Robertson Blvd. Talk about retail therapy — boyfriend Adnan was nowhere to be seen, and apparently Brit was having da blues about it.

However, it seems as though the pap may be in for a makeover, 'cause the "Crazy" crooner didn't appear to purchase any girly goodies — her dimes went totally on male attire.

Meanwhile, TMZ reports that sources are saying that Spears has multiple personalities, including "the British girl." Spears has been using a British accent in her speech recently.

Sources told TMZ that when Spears loses the British personality, she has absolutely no idea what she did during the time she assumed that personality. They also say she has a number of other identities, where she becomes "the weepy girl, the diva, the incoherent girl" and others.

They added that Britney had become the British girl the day she didn't show for her deposition and has no recollection of it.

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