Paris' former BFF, Kim Kardashian, had a less than friendly reception at Tangerine nightclub in Vegas last night. According to the Las Vegas Review-Journal, Kim, who was in town to support the launch of friend and other Paris pal, Caroline D'Amore's new clothing line, was booed at the club! To make matters worse, members of Kim's entourage had to be "removed" when they were rude to one of the VIP hosts! Ouch!

It looks like Alli Sims - Britney's assistant slash BFF - was certainly having a good time this weekend... at Paris' beach party! Alli partied with the heiress and co. at Paris' Malibu rental yesterday.

You have to wonder what their conversation was about -- there are plenty of topics: puppies, babies... or maybe they just talked about the weather. Or maybe Alli got some advice from Paris about making a hit album?

Another busy night for Hollywood's hottest celebs! We first caught Adrian Grenier talking about new movie The 11th Hour - a documentary about the global environment that's narrated (and produced) by Leonardo DiCaprio. Also spotted was Red Hot Chili Peppers lead singer Anthony Kiedis, The Hills' Audrina Patridge, a gorgeous Caroline D'Amore, Jon Lovitz(!), Samantha Ronson at Hyde - where else? - and Mr. Grenier winds up at Les Deux. Fun times!

Regina George (played by the magnificent Rachel McAdams) had quite the following in Mean Girls, or as they were called in the movie, an "Army of Skanks." And since young Hollywood is a lot like high school - and the city's reigning queen bees are currently incarcerated or detoxing - who will take over as leader during these hot and sultry summer months? There are definitely a few prime possibilities... These two are choice candidates - they might even get into a cat fight over claiming the title! Both are hot, rising talent, but Hayden Panettiere (who has a bit more flair slash attitude) is probably favored over Amanda Bynes, who still feels like the cute girl next door. Not that there's anything wrong with that!Elisha Cuthbert and Mischa Barton have been around the block and back!, but is this finally their chance to shine? Barton was recently in the news for an alleged pass out/overdose emergency hospital trip and Cuthbert has Captivity coming out. Maybe Summer '07 will have at least one of them ruling the Sunset strip. Wow, these young stars are growing up so quickly! That's Britney's sis Jamie Lynn Spears and that's Julia Roberts' niece Emma. Who's hotter? -- and more importantly, who's more likely to get in trouble at a nightclub because in the end, isn't that really what it's all about?
But what about the girls who are, so far, known only for their familial or friendly connections? Could one of them take the lead in this race? Check below the cut to find out!

...Caroline D'Amore was partying down with all Paris' pals! (Trying to claim the celebutante spot vacated by her incarcerated pal?) One of our guys stopped by the Roosevelt last night to see what was going on, and was practically blinded by all the starpower in attendance - in addition to Caroline and Kim Kardashian, our photographer reported spotting Tour De France winner/cancer survivor/rumored biopic subject Lance Armstrong chatting with an unidentified blonde as soon as he showed up! We've highlighted Lance in the picture below - see for yourself!

You'll also notice Paris lookalike Natalie Reid in that picture - or at least you'll notice her date, former TRL host Carson Daly! Wonder if they made it to Last Call?