Making the trip to Sin City, Christina Aguilera hosted the 2009 collection launch for Stephen Webster at TAO on Friday night (May 29).

Clad in a sexy black ensemble with silver heels and plenty of Stephen Webster jewelry, the “Genie In A Bottle” beauty has heaped nothing but praise on her designer pal.

Still going strong despite rumors of a split, Nick Lachey and Vanessa Minnillo were spotted out and about in Beverly Hills yesterday afternoon (May 29).

The “What’s Left of Me” crooner and his “Disaster Movie” gal looked to be enjoying each other’s company as they paid a visit to a gym and grabbed lunch at The Farm Restaurant.

In related news, Nick has teamed up with his brother Drew Lachey to form a Hollywood television production company called Flying Pig Productions.

Together they’re pitching four new reality television shows to TV networks in hopes of having “more control” of their careers.  “You don’t have to rely on others to bring you opportunities,” explained Drew of their decision to become producers.  As for the Flying Pig moniker?  “Only someone from Cincinnati would understand that name.”

In related news, Nick has teamed up with his brother Drew Lachey to form a Hollywood television production company called Flying Pig Productions.

Together they’re pitching four new reality television shows to TV networks in hopes of having “more control” of their careers.  “You don’t have to rely on others to bring you opportunities,” explained Drew of their decision to become producers.  As for the Flying Pig moniker?  “Only someone from Cincinnati would understand that name.”

She’s always been a fan of swanky Hollywood shindigs, and yesterday (May 29)  Jessica Lowndes was spotted at the Byron & Tracey party.

The “90210” hottie arrived at the Beverly Hills, California shindig sporting a big smile for the paparazzi as she sauntered past.

And Miss Lowndes was looking cute and casual in a blue vest over a white henley top teamed with a pair of slim-fit jeans and vintage brown leather high-heeled boots.

Jessica was in good company, as fellow celebrities like Ali Larter, Jordana Brewster, Michelle Trachtenberg, and Rosario Dawson were also in the house.

Out on an afternoon shopping trip,  Julia Roberts was spotted taking care of business in West Hollywood on Friday (May 29).

The “Pretty Woman” actress made a stop at Bill Hargate costumes, looking as if she were eyeing the purchase of a pregnancy suit before leaving the shop with a bagful of goodies and her gal pal.

Making the most of her time across the pond, Rihanna was spotted partying into the wee hours (3am) in London, England last night.

The “Take a Bow” songstress made her exit from Movida night club along with a large entourage, sporting a white vest over a grey top with a machine gun pendant.

Enjoying a little family bonding time,  Audrina Patridge was spotted out with her sister, Casey, grabbing a bite to eat at The Corner restaurant in Los Angeles, California on Friday (May 29).

The MTV reality starlet and her sis seemed to be having a marvelous time, as the two laughed amongst one another while making their way to the car following the lunch outing.

Later on in the evening, Audrina fancied up in a sexy black ensemble, heading off to Beso restaurant to meet her family for a fancy dinner on the town.

Meanwhile, Miss Patridge recently appeared on Ryan Seacrest’s radio show, during which time she was hounded about her rumored relationship with “Star Trek” stud Chris Pine.

When asked if the two are an item, Audrina replied: “Ryan, my lips are sealed. I am not talking about this!”

And though she wasn’t willing to dish on her personal life, the “Hills” hottie did acknowledge that nearly any new boyfriend would be better that her last.

“From Justin Bobby, I think any guy is an upgrade,” she tells.

This season’s American Idol runner-up, glam rocker Adam Lambert, will finally put all the speculation over his sexuality to rest when he publicly “comes out” as gay in the next issue of Rolling Stone Magazine, The NY Post is reporting.

After nude pics of R&B superstar Rihanna hit the Net with a venegence earlier this month, her “allegedly” abusive ex, crooner Chris Brown, denied any involvement in the leak. But Ri-Ri ain’t buying it – and the “Umbrella” hitmaker is threatening to release several saucy snaps of Chris in retaliation.

She even threatened to go “Left Eye” on his ass: “She was saying crazy things like, ‘I’m going to burn down his house,'” a friend of the 21-year-old tells the June 7 issue of Star of Rihanna’s reaction to finding nude images of herself plastered all over the Internet.

According to pals, once she calmed down, the singer began plotting her revenge against the man accused of beating her senseless.

`”She says she’s going to release her own photos of Chris. She has less-than-flattering nude pics of him that she plans on leaking. Rihanna says he’ll be really embarrassed,” whispers one in-house informant.

The diva is also planning to plant several humiliating stories about Chris’ sexual performance – or lack thereof – in a bid to leave her 20-year-old former flame shamefaced. Rihanna is already chuckling to friends that Chris was a clumsy novice at lovemaking until “she taught him everything he knows.”

“She’s going to ruin his sexy image.”

This week, it was revealed that Rihanna will testify against Chris Brown in a preliminary hearing last month stemming from felony charges that he assaulted her during a fight in Los Angeles last February.

Keeping up her look, Sienna Miller was spotted getting her eyebrows done at Anastasia salon in Beverly Hills, California on Friday (May 29).

Wearing a striped Chanel top with rolled up jeans and black kicks, the “Layer Cake” cutie was all business as she quickly walked past on looking paparazzi.

Meanwhile, Miss Miller recently chatted with press about the horrific experience of handling a gun while filming “GI Joe” – in which she plays The Baroness.

Sienna said: “It was scary. I got taken away from the group! They said, ‘Sienna, you’re a villain in this film and you look like you’re terrified of the gun.’ And I said ‘I am!’ But we were shooting live ammunition that could kill someone.”

Making the most of their romantic Parisian getaway, Rachel Bilson and Hayden Christensen stepped out for a day of tennis at the French Open on Friday (May 29).

The “Jumper” co-star lovers looked to be having a marvelous time at Roland Garros, as they grabbed their prime seats before checking out Hayden’s camera in between the action.

The European getaway started up as the two took flight out of LAX just ahead of Memorial Day weekend, with the pair enjoying a few days of shopping and sightseeing throughout their week in France.

And the trip overseas couldn’t have come at a better time, as Miss Bilson was the victim of burglars – who stole thousands of dollars worth of items from her Hollywood home earlier this month.