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While Gossip Girl star Ed Westwick was partying it up for his birthday down the street at TAO, the Kardashian women and friends were busy helping Khloe celebrate her 24th at Pure nightclub in Las Vegas on Friday (June 27).

Posing for the photographers upon arrival, Kim Kardashian and boyfriend Reggie Bush joined Khloe, Kourtney and Kris Jenner on the red carpet.

The “Keeping Up with the Kardashians” family continued on with a night of fun - socializing and dancing it up at the Caesars Palace hotspot.

In other Kardashian family news, Kim has started encouraging her fans to get in shape, offering up tips on her personal blog.

The first piece of advice: “An exercise that I've been doing every day that's really been helping and no gym equipment is needed is... Get a chair or even go near your couch and make sure nothing is in front of it so you can stand right in front of it and act as if you are going to sit down but don't actually sit! Just lightly touch your booty on it and come back up. Do that seven times! Then do the same thing but this time only half way, come back up and do that seven times. Then do it one more time but when you go to sit down and come back up, only come up about an inch up off the chair! So each time you go lower and lower! Once you finished your lucky 21, take a break and try it again. I try to do that cycle four times.”

With all of the celebrity restaurant appearances these days, you gotta wonder - does anyone cook anymore? Last night, Britney Spears was spotted out to dinner at Sur restaurant in West Hollywood.

The “Gimme More” songstress looked flirty in a black-with-embroidered-designs minidress teamed with a pair of massive platform heels and an oversized black handbag.

Meanwhile, her ex-hubby Kevin Federline was spotted on the opposite coast, doing a little shopping with some guy pals in Miami, Florida. He looked cool and relaxed in a baggy grey t-shirt along with a pair of shorts and white sneakers.

As far as their ongoing custody case, it seems Brit and Kevin are indeed headed back to court this August. A recent meeting with a mediator reportedly wasn’t enough to settle things.

K-Fed’s lawyer, Mark Vincent Kaplan, told press, "The mediation didn't result in an agreement that would avoid the trial set in August ... The mood was comfortable, positive and it was a mood that was consistent with opening at least a great dialogue, which is necessary."

The Photographers Gallery in Los Angeles, California got a little more fabulous last night, as Paris and Nicky Hilton hosted a swanky Tinseltown photography exhibit to benefit charity.

“The Good Life” which showcased artwork by photographers Slim Aarons and Murray Garrett even got an extra boost of Hilton presence, with mom Kathy and dad Rick showing up to check out the scene.

Paris’ boyfriend Benji Madden was spotted chatting and laughing with Papa Rick, a good sign that he’s been embraced by Paris’ family.

Speaking of Benji and Paris, it seems their collaborative skills have surpassed the lovers realm. He’s reportedly helping her with the theme song for her new show.

Hilton told press, "Benji and I have been working hard on it. He's helping me write the lyrics for the song and then I'll sing it, too.”

The former Simple Life hottie also divulged plans for a sophomore album. "I'll have another album come out, for sure. I just don't know when yet. I only have the summer off, then I'll be taping another season of BFF. But an album is something I'll do."

Her ability to perform at the Nelson Mandela 90th Birthday concert last night was in serious question when she was hospitalized last week. But like a pro, Amy Winehouse showed up after all.

The Back to Black songstress, diagnosed with diminished lung capacity, still seemed to pull herself together enough to take the stage at the Hyde Park, London shindig. And she looked to be in fine form.

Rocking a black and white top teamed with a shiny black skirt, the “Rehab” singer put on one heck of a show, regardless of her medical woes. But after the gig, she was singing quite a different tune.

After changing her clothes and signing a few autographs, Amy quickly made her way back to the medical clinic for what could be assumed to be further treatment for her ailment.

According to a source on the scene, "Amy was at first happy to sign autographs for fans before turning and storming inside in a sudden change of mood."