The Disney sweetheart is guest starring on hit TV soap Gossip Girl and we finally caught her in a sexy outfit this time! Definitely an improvement from the other day...

Also on set? Penn Badgley, Ed Westwick, Leighton Meester and Taylor Momsen. Uh-oh, but where was Blake Lively? Wonder if Hil Duff is stealing her screen time!

Mmm, ya think?

Sienna Miller chatted with GQ UK about her new movie (G.I. Joe, which hits theaters this Friday), her private life and that very public romance with married actor Balthazar Getty.

On her relationship with Balthazar:

"[It] probably looked awful. I probably seem like not a particularly nice person, not a girl's girl."

On whether or not she's a slut "sexually manipulative":

"I'm supposed to be this complete slapper, that's my reputation. But actually I was in a relationship from 19 to 21 with Dave [Neville]; 21 to 24 with Jude [Law]; then 25 to 26 with Rhys [Ifan], and then Balthazar. And then a few dalliances, three months here and there, but I've never been like a shagger. I've actually been kind of single for the past year. I've had somebody on the end of the phone maybe, but I haven't been living with anyone or been in a proper relationship, and it's been really great."

On her homewrecker reputation:

"I do think sometimes people get morally superior without understanding situations. And the situation I got into was not ideal, but it happened and if I could go back and be more responsible, I would...I probably would be less naive about ignoring the fact that people care. I've always kind of done exactly what my instincts said. I have a good brain on me, but I've never really used it when it came to making decisions about love, which has been a blessing and a curse. I definitely have been foolish. I've made apologies to people I needed to, but I can't apologize to people I don't know for things they don't understand."

Does she really seem like the monogamous type? What about her flings with Josh Hartnett and Hayden Christensen? And that's just the beginning!

Jessica Simpson wasn't the only sexy star who went to Beso last night! Kim Kardashian also stopped by to wish Ken Paves a happy birthday, and she seemed genuinely surprised with all the photogs and fans gathered outside of the restaurant. Hey don't worry Kim, they weren't all there for you...

Whoops - when you're 61-years-old, you've gotta be more careful!

Aersomith frontman Steven Tyler was performing at South Dakota's Sturgis Motorcycle Rally last night when he fell down after stepping backwards off the stage, reports NY Daily News. Apparently he had put down the mic and was dancing all around before the accident occurred...

Tyler was flown to a hospital via helicopter - the show came to a halt - and was treated for minor injuries. Hope the rocker is okay! After all, what doesn't hurt you makes you stronger.

What's the best way for an adulterous celeb to take their mind off of their failed marriage? Retail therapy!

Yesterday LeAnn Rimes was snapped shopping in Malibu, and even though the singer didn't have her wardrobe consultant soon to be ex-husband with her, she looked like she was holding up pretty well. Maybe she's already found a new guy?

Kate Gosselin will sit down with Meredith Vieira on NBC’s Today Show next Monday, which is her first television interview since announcing her split from her husband Jon less than six weeks ago.

The mother of eight will discuss the divorce and raising the estranged couple’s eight kids under the media spotlight, reports Access Hollywood.

While Jon has been off partying with Michael Lohan and dating multiple women, Kate has been keeping a pretty low profile, so it should be pretty interesting to see what she has to say!

Last night, Ken Paves celebrated his birthday at Beso, and even though he was joined by celebs like Eva Longoria and Mario Lopez, it was Jessica Simpson and her gorgeous blonde locks that caused the most craziness.

When Ken and Barbie Jessica left Eva's restaurant, they could barely make their way to the car, and once they did manage to squeeze inside the waiting vehicle, someone violently threw a water bottle at the car window! The water-pelting perpetrator was caught, and after Jessica's SUV pulled away, a fight broke out and several men kicked him to the ground!

Oh, and that's not all! A few minutes later, as Jessica's parents Joe and Tina exited the eatery, one of their friends grabbed a hold of a photog's camera, and this nearly resulted in another fight with three photographers. Talk about drama!

Check out the video below to see the mayhem!

Britney Spears has confirmed on her official website that she'll be performing at the 2009 Teen Choice Awards, which tapes this Sunday night and airs on Monday.

The announcement reads: "Breaking News: Britney will be performing at the Teen Choice Awards on Monday! Tune in to Fox at 8/7C to see Britney's performance and if she wins the three awards she's nominated for."

Britney is up for three awards, including Choice Music: Single for "Circus," Choice Music: Female Artist and Choice Music: Tour. Brit will join stars such as the Jonas Brothers, Miley Cyrus and the Twilight cast, and while we're not sure what song the pop princess will be performing, we can't WAIT to watch this!