Heidi Pulls 'Kill Switch' on Sex Tape Negotiations

So much for Heidi and Spencer in XXX ... TMZ has learned the estranged couple has officially cut off negotiations with Vivid Entertainment honcho Steven Hirsch ... telling him they're no longer interested.

Sources close to the couple tell us Spencer's rep shot a letter to Hirsch explaining, "Heidi's made it very clear that she is not interested in releasing any tapes" ... adding, "It looks like she pulled the kill switch."

The letter also explains, "Spencer's not interested in further destroying their relationship by pursuing an avenue she's so vehemently against."

Spencer's rep also told Hirsch that Pratt "thought $5 million would be enough to convince her, but now [Heidi] is saying she'll bring out the legal team if he persists."

Credit: TMZ

Lauren Conrad: Girls Night At My Studio

A smiley Lauren Conrad was spotted out at My Studio nightclub in West Hollywood last night. The former "The Hills" star had earlier dined at the Loteria restaurant with some gal pals.

Credit: Zimbio

Photos by PacificCoastNews.com

Kim Kardashian Drops By the "Tonight Show”

She’s always up to something and last night (August 31) Kim Kardashian was spotted paying a visit to “The Tonight Show with Jay Leno.”

The “Keeping Up with the Kardashians” babe looked amazing as she chatted with the late night host about the many facets of her crazy life.

Credit: Celebrity Gossip / NBC

Kristin Cavallari Shows Her Bears Pride

She’s always on the go, and yesterday (August 31) Kristin Cavallari was spotted at LAX International Airport.

The former “Laguna Beach” babe looked to be in good spirits as she sported a Chicago Bears football team ballcap and Miu Miu desert suede studded platform slingbacks ($396), sparking even more rumors of a romance with Jay Cutler.

Credit: Celebrity Gossip

STYLE POLL: Kristin Cavallari v Kim Kardashian

Kristin paired her Hannah Marshall dress with white heels for an L.A. awards show, while the Kim added a clear belt to her leather-topped dress for a magazine bash in L.A.

Who wore Hannah Marshall best?
Kristin Cavallari
Kim Kardashian

View Results

Credit: People

Kim Kardashian: Why I Didn't End Up Like Paris

Kim Kardashian's frenemy Paris Hilton was arrested over the weekend for felony cocaine possession -- her third link to drugs this summer.

How has Kardashian, 30, managed to stay out of trouble?

"I've never been a drinker, I've never gotten into drugs," she said on The Tonight Show With Jay Leno Tuesday. "You know, I think I have such a close family. I think, you know, at a young age. I think you know my sisters do enough drinking to kind of fill up the whole family.

"From a young age, my dad made it very clear that, 'OK, you're the responsible one and you have to watch your sister, and (he) taught me how to drive when I was 14 in case my sister or her friends were going to be drinking and I always had permission to drive," continued Kardashian (whose younger sister Khloe was arrested for DUI in 2007). "You know, I had to call him from the destination and the final place. I always felt this sense of pride that he had in me that I was the responsible one so I always wanted to make him proud. And I hate the taste of alcohol."

She does, however, indulge in a White Russian occasionally.

"I said at 30 I'm gonna at least have a drink to lighten-up 'cause my sisters say I'm so boring," she told Leno. "So I tried a White Russian a few months ago. If I have one, it tastes like chocolate milk and it's kind of amazing. So every once and a while, but I'm 30 so it's OK."

Credit: Us Magazine

Kendra Wilkinson: Barnes & Noble Book Signing

Still getting the word out about her new book, Kendra Wilkinson was spotted at Barnes and Noble in Philadelphia, Pennsylvania yesterday (August 31).

The “Girls Next Door” babe looked to be in good spirits as she posed while holding a copy of “Sliding Into Home” for the press.

Credit: Celebrity Gossip