Talk about a sweet celebration!

In honor of Oreo's 100th birthday, Lady Antebellum showed up at The Grove on Tuesday morning to belt out a few of their hit tunes in a surprise free concert for one of America's favorite cookies!

Before singing "Happy Birthday" to a giant Oreo (yum!) the Grammy winning band kicked off a Happy Birthday flash mob, which was just one of seven similar celebrations that took place across the country in honor of the delicious treat.

After 100 years Oreo, you haven't aged a bit!

Camila Alves, aka the soon-to-be Mrs. Matthew McConaughey, looked chic in a pair of purple skintight pants as she proudly flashed her new engagement ring while chatting with Extra's Mario Lopez about her upcoming handbag line. The Brazilian-born stunner will be presenting the line on QVC Saturday night, and she says her inspiration for the designs came from her travels to Texas, Arkansas, New Orleans, California and New York.

Real Housewives of New York star Bethenny Frankel showed up to promote her new Skinny Girl food and drink line, and she made sure to show off her ultra-thin frame in a sparkly tank and short shorts while doing it. If Skinny Girl products are Frankel's secret diet weapon, they're working miracles for her!

Meanwhile, Heather Locklear's ex-fiancé Jack Wagner also turned up to promote the latest season of Dancing With The Stars with his gorgeous partner, Anna Trebunskaya. The Melrose Place star is gearing up to battle it out for the coveted Mirror Ball trophy when season 14 kicks off on March 19 -- think he has what it takes?

Baby number two may be on the way, but Kourtney Kardashian is still looking better than ever!

The pregnant reality starlet was snapped filming her reality show on Melrose today, and it sounds like she's STILL searching for a location for the family's new Dash boutique. Last month we caught Kourt and Kim checking out retail spaces on Robertson Blvd, but with Kim off in Paris and Khloe several hundred miles away in Texas, it looks like the mom-to-be is on her own. Maybe baby daddy Scott Disick can help?

We already knew Vanessa Hudgens was playing a gun-toting party girl in her next film, Spring Breakers, but who knew she was rocking a trashy blonde wig? We kinda love it!

Vanessa posted this picture on her blog today and wrote, "Time to see if blondes really do have more fun lol! Its for my new role in Spring Breakers!" Vanessa is currently shooting the movie in Florida with Selena Gomez and Ashley Benson, and the plot follows a group of girls who rob a bank to help finance their spring break vacation. Sounds like a new take on Sugar and Spice, but with a little more action!

Katherine Heigl isn't letting the dreary Los Angeles weather get the best of her ... in fact, she looks like a ray of sunshine in her bright yellow jacket! The 33-year-old actress headed to an LA nail salon for a quick touch-up of her tootsies, and we wish we looked this fashionable for a day at the spa!

Although, is it just us, or does Naleigh's mama dress a little too old for her age? We'd love to see the Grey's Anatomy star show off her killer bod a little more!

Speaking of Grey's Anatomy, Heigl recently admitted she would love to return to reprise her role on the TV series, but show creator Shonda Rhimes shot down the rumors it would happen.

Maybe now Mrs. Josh Kelley can focus her energy on giving Naleigh a sibling?

Oprah Winfrey has landed the exclusive first interview with Whitney Houston's daughter, Bobbi Kristina.

In a quick preview, the 18-year-old daughter of Houston and Bobby Brown gets a big hug from Lady O.

The special, airing on OWN's Oprah's Next Chapter on March 11, also includes interviews with Whitney's sister-in-law and manager Patricia Houston and her brother Gary Houston.

Jennifer Lawrence covers the April issue of Seventeen, and the 21-year-old Hunger Games hottie dishes on dieting, her co-stars and what she does in her down time.

"I remember when I was 13 and it was cool to pretend to have an eating disorder because there were rumors that Lindsay Lohan and Nicole Richie were anorexic. I thought it was crazy," Jennifer tells the mag. "I went home and told my mom, 'Nobody's eating bread -- I just had to finish everyone's burgers.'"

Jen added that she's "so sick of these young girls with diets ... I think it's really important for girls to have people to look up to and to feel good about themselves."

So what does she do when she's not working? "I love to just hang out with my friends and watch Real Housewives," she says. "My favorite cast used to be New Jersey, but now I'm really into Beverly Hills."

Jen also chats about her co-stars Josh Hutcherson and Liam Hemsworth, telling the mag, "Josh and Liam are really great friends, too. They are hilarious and sweet. They are like my brothers. As soon as we all got together, we reverted back to being 13-year-olds," she says. "Josh and I were neighbors. Every time I would come in late, I would go and bang on the door and wake him up and we'd all hang out."

The flick hits theaters March 26 ... can't wait!

Cassie is set to drop her highly anticipated second album this spring, and she's currently in Paris to promote her new single, "King of Hearts". Of course, this isn't the only reason she's in France -- the 25-year-old R&B starlet has been spotted at several fashion shows, and yesterday we snapped her going on a shopping spree with Diddy. Such a rough life!

Last night Cassie dined in the City of Light, and she tweeted this shot and wrote, "King of Hearts. Paris. Dinner ;) Xx." But where's the rest of her shirt?! Maybe Diddy needs to take her shopping again...