Nicole "Snooki" Polizzi is showing off the perks of her pregnancy.

Rosie Huntington-Whiteley rocks some tight work out attire as she leaves her gym on Thursday (March 29) in West Hollywood, Calif.

Teaming up to show off the brand's latest looks, Miranda Kerr and Candice Swanepoel took over the spotlight at The Thompson Hotel in Beverly Hills, California on Thursday (March 29).

Newborn? No problem!

Reese Witherspoon heads out of an office building while running errands on a busy Thursday (March 29) in Los Angeles.

Tending to her DKNY brand ambassador obligations, Ashley Greene was on-hand for a fan greeting at Macy's Herald Square in New York City on Thursday evening (March 29).

Vanessa Hudgens holds hands with her beau Austin Butler as the two enjoy their day off on Sunday (March 25) in New York City.

Making a gorgeous arrival, Olivia Wilde was seen entering the the 2012 Jameson Empire Awards in London, England on Sunday (March 25).

Lindsay Lohan flashed an ear-to-ear grin after her final meeting with her probation officer last week in Santa Monica ... as can clearly be seen in this photo obtained by TMZ.

Can't be tamed indeed.

Jennifer Lopez holds hands with her boyfriend Casper Smart as they arrive in São Paulo, Brazil on Sunday (March 25).

There's no doubt that they're still going strong, as Robert Pattinson and Kristen Stewart were spotted out on an eventful date night in Hollywood over the weekend (March 24).

Christina Aguilera, Jennifer Lopez and (begrudgingly) Adam Levine may be into the idea of creating their own fragrances, but one star who's not? Carrie Underwood.

Someone either doesn't like Kim Kardashian's new perfume, True Reflection, or they don't like Kim Kardashian – or both.

Emma Watson keeps dry under a black umbrella on the set of her latest project, Bling Ring, on Wednesday (March 21) in Los Angeles.

Just two and a half months removed from giving birth to her first child, Beyonce Knowles is in the process of easing back into work.

Hilary Duff is a mom!

Following a celebratory awards season with the success of her supporting role in The Artist, Penelope Ann Miller has some news that isn't so joyous.

Bundled up for the chilly morning weather, Sandra Bullock and her son Louis made their way to school in Beverly Hills on Tuesday (March 20).

Amanda Seyfried and new boyfriend Josh Hartnett hit the beach with their dogs on Tuesday (March 20) in Malibu, Calif.

There's another little angel on the way for Victoria's Secret model Adriana Lima.

Mason, Scott and I met Kendall for lunch at Rosti. It was a LONG day since I traveled in that morning at 5:30am from QVC where I was showing our new K-DASH collection! I love this Kardashian Kollection sweater which also comes in grey, but I opted for the green one since it was St. Patrick's Day.

Browsing through cosmetics, Kate Hudson was spotted shopping with her son in London on Tuesday (March 20).

Miranda Kerr rocks a figure-hugging blue skirt with a black top while heading to an office building on Tuesday (March 20) in New York City.

Jessica Alba: actress, wife, mother, and now, author!

Kris Jenner has a shopping problem – and it's not sitting well with one of her daughters.

Jessica Simpson reveals two things in this month's Elle Magazine: she's having a baby girl, and, well, her entire naked body.

Katy Perry is pretty as a picture as she arrives at the BBC Maida Vale Studios on Sunday afternoon (March 18) in London, England.

Donning an all green outfit on St. Patrick's Day, Stacy "Fergie" Ferguson posed for pictures on the red carpet at the Confidential Beverly Hills for the launch of Don-A-Matrix Training on Saturday (March 17).

Desperate? Hardly.

Julianna Margulies is no stranger to television — but she's doing her best to make sure her son Kieran Lindsay is!

Miranda Kerr carries her 14-month-old son, Flynn, back to their apartment on Wednesday (March 14) in NYC.

Keeping busy flying around the US, Demi Lovato was spotted making her way through the LAX Airport in Los Angeles, California on Wednesday (March 14).

Lindsay Lohan lightly struck another vehicle with her own car early Wednesday morning, police confirm.

Avril Lavigne strikes a pose at the launch party for her new Abbey Dawn accessories collection held at the Viper Room on Tuesday (March 13) in West Hollywood, Calif.

Looking effortlessly chic while out in Beverly Hills, Kate Bosworth was spotted at the Screen Actor's Guild building on Wednesday (March 14).

Charlize Theron is a new mom, but that's not stopping her from stepping out.

Finally making the news official, French actor Olivier Martinez confirms reports from January that he's engaged to Halle Berry.

Sticking with her routine while bringing a close to the weekend, Kim Kardashian attended her local church's service before enjoying some quality family bondding in Calabasas, California on Sunday afternoon (March 11).

Rihanna steps out in a fully sheer top while dining at Da Silvano on Sunday (March 11) in New York City.

Absence has made Kate's heart grow fonder. With her husband away in the Falkland Islands, the Duchess of Cambridge confessed she has been "missing him terribly."

Ready to bring her beautiful self to the Studio 8H stage, Sofia Vergara will be taking her laugh inducing accent to "Saturday Night Live" next month.

LeAnn Rimes keeps a low profile as she lands at LAX Airport on Saturday (March 10) in Los Angeles.

Following a year of romantic vacationing and double dates, Eva Longoria and Eduardo Cruz have called it quits, a source confirms to PEOPLE.

Vanessa Hudgens rocks a pair of black short shorts while walking around the set of her upcoming film Spring Breakers on Thursday (March 8) in Sarasota, Florida.

Fresh off of the long overseas flight, Emma Watson was spotted after touching down in Los Angeles, California on Thursday night (March 8).

It's a new start for Demi Moore.

Ready to take the Lincoln Center stage, Angelina Jolie was among those on-hand for the 3rd Annual Women in the World Summit in New York City on Thursday evening (March 8).

It's a high-calorie job, but somebody has got to do it – especially if that somebody is eating for two.

Lindsay Lohan debuts her new flowing red hair as she leaves a medical building on Thursday (March 8) in Beverly Hills, Calif.

Alicia Keys and Rosario Dawson attend the Kanye West Ready-to-Wear Fall/Winter 2012 show at La Halle Freyssinet on Tuesday (March 6) in Paris, France.

Katherine Heigl smiles big for the cameras as she heads to meet up with a friend at Il Capriccio for lunch on Monday (March 5) in Los Feliz, Calif.

With their first wedding anniversary on the horizon, Blake Shelton says that there isn't anything he would change about being married to Miranda Lambert.

In her just-aired one-hour documentary, Demi Lovato openly talked about her battle with an eating disorder, cutting herself and being diagnosed with bipolar disorder.

A Leap Day baby!

All bundled up in the brisk NYC weather, actress Dakota Fanning made her way out to get in a little fitness time.

Feeling uncomfortable with the mob of shutterbugs, Miley Cyrus made a quick call to the Los Angeles Police Department on Tuesday afternoon (March 6) for an escort to her car.

When a new baby arrives, the older ones tend to feel left out. But mom-to-be Molly Sims has promised that won't happen to her "babies," Yorkies Chloe and Poupette, when her first child arrives in June.

Although Nicole “Snooki” Polizzi has remained mum about her rumored pregnancy and engagement, the pint-sized reality star was spotted on Monday afternoon wearing new diamond ring on her wedding finger.

Salma Hayek and her husband, Francois-Henri Pinault, snap a photo together as they arrive at the Stella McCartney Ready-to-Wear Fall/Winter 2012 presentation during Paris Fashion Week on Monday (March 5) in Paris, France.

She's going to be a mom!

Hi dolls! I interviewed Kristin Chenoweth before and after the premiere of her new show GCB and I had so much fun talking to her. She is SO sweet — such a little ball of energy! I really am a huge fan! You can listen to our interview on Friday above and then today's interview below.

Taking care of business, Kate Bosworth was spotted walking into an office building in Century City, California on Monday (March 5).

Nicole Kidman flashes a smile while leaving her hotel on Monday (March 5) in Paris, France.

She's confidently stepped out solo into the spotlight. Now, Kate is getting ready for two more royal milestones.

Making certain to keep herself in tip-top shape, Miley Cyrus spent her Sunday morning (March 4) out jogging the streets of her Los Angeles neighborhood.

Heidi Klum goes down a slide with her adorable daughter Lou sitting on her lap while at a park on Saturday (March 3) in Los Angeles.

Fresh off of what she hopes was a career-reviving hosting gig on "Saturday Night Live," Lindsay Lohan treated herself to a retail romp ion New York City on Sunday (March 4).

She may have initially made her mark playing New Yorker Rachel Green on Friends, but that doesn't mean the Big Apple was the right place for Jennifer Aniston.

Sophia Bush is absolutely stunning at a cocktail reception honoring director Richard O'Barry on Saturday (March 3) in Los Angeles.

Bringing her sexy ways to the UK small screen, Rihanna's pre-taped appearance on "The Jonathan Ross Show" aired on Saturday night (March 3).

Molly Sims just logged another visit to the doctor this week – this time, for her dog.

LeAnn Rimes heads to the McMillan Canale Salon on Friday (March 2) in Malibu, Calif.

Lindsay Lohan wears a pair of bright red alice + olivia by Stacey Bendet pants while leaving her hotel on Friday (March 2) in New York City.

Lady Gaga shows off her bra in a revealing outfit while leaving her hotel on Friday (March 2) in New York City.