Courtesy: Missoni

Leighton Meester looks absolutely delicious in the new ad campaign for Missoni's Spring 2011 collection. We love that horse she's rocking!

Instead of making Leighton overtly sexy, Missoni has the Gossip Girl star looking young and fresh while surrounded by tons of little toys. Adorbs!

We can't wait to see the Country Strong's co-star Blake Lively in her new ad campaigns for Chanel's Mademoiselle hand bag line. It pays to be a Gossip Girl!

Photo credit: Randee St Nicholas

Britney Spears is heading for HUGE comeback, and we couldn't be happier for our favorite pop star!

After her new single Hold It Against Me was released early on Monday, it quickly became the #1 single to be downloaded on iTunes this week. The girl's still got it!

After hearing the news Ms. Spears expressed her gratitude via Twitter:

"Seriously, I have the best fans ever. I love you all so much!! Everything I do is for you! xoxo Brit."

And not only that, Jive Records just sent out a press release claiming Brit's song immediately shattered previous records for the most number of radio spins after only being released for one day.

Congrats, Ms. Spears!

Michelle "Bombshell" McGee, who rose to fame last year for allegedly having an affair with Sandra Bullock's ex, Jesse James, got up close and personal with pornstar Bree Olson during Pauly Shore's Vegas Is My Oyster comedy show at The Palms Hotel Resort And Casino.

Aside from getting some serious lip, and tongue, service from Bombshell, Olson also reportedly hooked up with actor Charlie Sheen a day later.

Sheen met up with the porn star in his luxury suite at the Palms. X17online has learned exclusively the Two and A Half Men actor was staying in the Hugh Hefner Sky Villa inside the Fantasy Tower.

Nothing but the best for Mr. Sheen!

Two cute! It's been too long since the last Hollywood bromance. John Mayer dined out at Matsuhisa in Beverly Hills the other night with insult comic slash roast master Jeff Ross. Good to see Mayer out and about! The sexy singer hasn't dated Jessica Simpson or Jennifer Aniston during the past couple months, so we haven't really heard much about him. Think he's done with Tinseltown starlets for good?

Tom Hardy photo courtesy of Warner Bros.

Lindsay Lohan may be hanging out with ex-girlfriend Samantha Ronson a lot lately in Venice, but a source close to Lilo tells us that "her heart is with Tom Hardy."

Hardy, who has been labeled Lindsay's "sober coach," has been spending day after day with the actress.

The source tells X17online exclusively:

"Lindsay loves how Tom has been sober for years, and she wants to make sure she follows in that path. He's a good looking guy with a great career who has overcome some major obstacles. They're perfect together. Lindsay hopes it will turn into a serious relationship. She's really into him."

Hardy is reportedly engaged to actress Charlotte Riley. Sounds like this could be drama in the making. We have to say, if this relationship does works out between Linds and Tom, they could definitely be the sexiest couple in Hollywood!

We knew celebs were posting random Twitter ads to make some sweet side cash, but we never figured they'd be worth millions of bucks!

Curtis Jackson, aka 50 Cent, worked his Twitter account Monday to help launch the shares of a no-name penny stock company called H&H Imports, which he's also invested some major cash in.

Cent Tweeted:

"You can double your money right now. Just get what you can afford."

Who could resist that opportunity? It definitely worked out for the rapper; H&H closed at 39 cents yesterday, up 29 cents, and boosting 50 Cent's 30 million-share stake by $8.7 million. Cha Ching!

Hey, when your Twitter account is 3.8 million followers strong, it can definitely be considered a lucrative side business.

Bananas!

Stylist to the stars Rachel Zoe is seven months pregnant with her first child and, in an interview with Women's Wear Daily, made the statement: "It all depends on his arrival," while patting her belly.

Husband Rodger Berman then confirmed, "It's a little boy."

Congrats to Zoe! The stylist, who'll be dressing Anne Hathaway at the Oscars this year, admits she's "been asked to slow down."

Zoe then explains, "But to be totally honest, it's kind of next to impossible when you're planning your show and launching your collection, and in the middle of award season."

We're not surprised the 39-year-old plans to stay busy, busy, busy!

Courtesy: Lily Rose Allen Blog

It seems Lily Allen has beat out all the newly engaged celeb couples by secretly tying the knot first! Sneaky girl!

The sexy Brit revealed a pic from her blog via Twitter, and while she says she's showing off of her latest manicure, it's pretty obvious that's not all she's trying to reveal.

Allen's boyfriend, builder Sam Cooper, proposed to the songstress on Christmas Day in Bali, and while we were looking forward to lavish photos of the ceremony, we're happy the couple was able to share some private memories after suffering through the tragic loss of their baby last year.

Lily has described Sam as a 'normal bloke' and 'the love of my life'. Congrats to the happy couple! Let's hope Mrs. Cooper shares the wedding photos soon!