Dress by Isabel Marant, necklace by Jules, shoes by Elizabeth and James available at Saks.

Blazer by DKNY, tank by Calvin Klein available at Lord & Taylor, skirt by Banana Republic, necklace by Nissa, tights by Fogal, shoes by Stella McCartney.

The creators of The Buried Life share how you join celebrities like Justin Timberlake, Alicia Keys and Usher in giving up your digital life on December 1 to BUY LIFE in support of World AIDS Day.

What childhood lesson gets this star in a twist? What holiday movie does he love watching over and over again? Get to know Chuck's Zachary Levi as the star shares three things you don't know about him!

Peek inside this star's dressing room and see what's happening when Melissa Joan Hart invites our cameras backstage!

Shirt by Alice + Olivia, skirt by Derek Lam, necklace by Nashelle, tights by Fogal, shoes by Derek Lam.

Dinner Outfit (www.brunellocucinelli.com).

After struggling with the diet for a few weeks, Christina hopes her persistence at the gym and with her food choices pay off! She's heading back to the scale for her latest weigh-in!

Looking for a fun dessert idea this holiday season? The Cake Boss is sharing an extra tip to make sure your treats sparkle this year! Plus, click here to watch Buddy Valastro teach Rach how to decorate cupcakes your kids will love!

Dress by Isabel Marant, necklace by VSA Designs, tights by Fogal, shoes by Stella McCartney.

Dress by Suzi Chin available at Macys, necklace by Suzanna Dai, bracelet by Marlyn Schiff, tights by Fogal, shoes by Stella McCartney.

Dress by Catherine Malandrino, necklace by Chan Luu, bracelet by Stephen Webster, tights by Fogal, shoes by Stella McCartney.

Dress by Catherine Malandrino, necklace by VSA Designs, bracelet by Presh, tights by Fogal, shoes by Stella McCartney.

Do you love the flirty dresses, glam rock and military-inspired looks Rach is wearing this season? Find out how to get similar outfits for yourself as her stylists Jane and Cara take us shopping and check out these hot new trends!

Christina and her dad clash at mealtime as the stress of their diets hit home -- will they remain inspired and reach their weight-loss goals?

Dress by Ali Ro, necklace by Marlyn Schiff, bracelet by Presh, tights by Fogal, shoes by Stella McCartney.

Shirt by Alice & Olivia, skirt by DKNY, necklace & bracelet by Jody Singleton, tights by Fogal, shoes by Stella McCartney.

What's Office star Rainn Wilson doing in a music video? Find out as he chats with us backstage with pop singer Andy Grammer!

Plus, click here to watch the video for "Keep Your Head Up" and try and spot Rainn!

Get a special preview of The Office's Rainn Wilson's latest side project!

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Go backstage with former Playboy cover girl and new author Kendra Wilkinson!

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Jessica shares a hilarious story of how her marriage to Jerry Seinfeld helped inspire The Marriage Ref!

How do you prepare a cooking demonstration for viewers across the country and around the globe? Go behind the scenes as Team Rachael Ray gets ready for the World's Biggest Cooking Demo! Get the ingredients here so you can cook along, too!

Rachael welcomes her studio audience in New York, her West Coast host Wes Martin and hundreds of cooks in Los Angeles, and checks in with a viewer in Philadelphia via Skype as the World's Biggest Cooking Demo begins!

With the cooking demo moments away, Rachael instructs viewers to pre-heat their burners, and reveals a special surprise for one viewer Skyping in from Washington D.C. - a visit from design expert Sabrina Soto and a complete dining room makeover!

The World's Biggest Cooking Demo officially begins as viewers start browning their birds to make Honey Mustard Chicken!

The demo continues to sizzle as Rachael fields cooking questions from her audience, a Skyper from Nashville and one of the hundreds cooking in Los Angeles!

The Honey Mustard Chicken is almost ready for tasting, so Rachael gives one final check-in to a Skyper in Phoenix.

Supper's ready as viewers in New York, Los Angeles and around the world taste their Honey Mustard Chicken, and Sabrina Soto reveals her dining room makeover for our viewer in Washington, D.C.!

When a tough trainer drops by to help Christina and her family get into shape, the father-daughter workout makes her rethink her relationship with her dad. Can they find a way to support each other and make their diets work?

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This pop star knows how to make hits out of more than just music, he's also a whiz in the kitchen! Find out more about Huey Lewis as he shares 3 things you don't know about him!

Shirt by James Perse, skirt by DKNY available at Lord & Taylor, necklace by Camilla James, tights by Fogal, shoes by DKNY.

The off-the-wall Ken Jeong takes you backstage after meeting Rachael, and tune in tomorrow when he brings the laughs to her kitchen!

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Christina loves reading your messages and can't wait to thank you for your support!

Have a message for Christina? Post it here.

Christina gets a surprise message from Dr. Oz at the studio! Get his advice for shedding pounds and making a diet work for good!

Rachael welcomes Christina and her father back to the studio for a pep talk and offers to stay with the teen for this week's weigh-in to see if her diet is back on track!

Can you relate to Christina's story? Join our online community to give Christina your encouragement and share your own weight-loss stories!

Christina faces one of her toughest weigh-ins yet as she hits the scale after being tempted by some of her favorite treats at her sister's party.

Christina's diet is challenged as she shops for party snacks and hangs out at her sister's sweet 16. Will she avoid temptation when surrounded by junk food?

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The co-host of The Howard Stern Show shares three things you don't know about her, and check out how she has been training for the 2010 ING New York City Marathon!

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Hi everyone!

Ricky and I are still adjusting to our new life as parents - changing diapers definitely takes some getting used to! I admit, since the baby was born we’ve had some unfortunate spillages, but we’ve gotten much better! I’m still working to get the swaddle down pat. Sometimes Kai looks like a burrito that’s gone too loose and that just means he’s not wrapped correctly. You can tell I’m not a cook! Rachael would’ve been a much better swaddler than me! When I get it right and when he’s nice and smooth and snug, it’s very gratifying. He’s able to rest and he looks so comfortable.

But this is a far cry from where we began …. Nursing is a commitment, and there are techniques and skills that make it easier on the mother and child - I’m sure other new moms would agree it’s amazing how much there is to learn! We are getting better, but you won’t believe some of the questions Ricky and I had during the pregnancy when we went to The Pump Station in LA for a baby-care class. I’m sure you can relate, so I’m going to share a bit of our experience with you. Check out the video from our first class and then write in to share your experiences and let me know how you are doing!

XO Gretta

First of all, let me say for the record to all you future dads out there - I really wish I had paid more attention during the pregnancy when Gretta and I took some baby-care classes! My mentality was more like, “I’ll do it when the baby arrives,” but now I find I can’t swaddle to save my life. I’m a perfectionist and I still can’t get it right! I want to be the dad that comes into the room and saves the day. I want to be the partner that can step in when Gretta is overwhelmed and get the baby to “magically” stop crying. But I now realize it’s not that simple …

Now that Kai is here and there’s a real baby that has many needs, the one thing I know is that I don’t know anything … at all! My advice to the fathers-to-be out there would be to start learning during the pregnancy and take as many classes as you can; I promise they’re actually pretty fun! To make it a little easier for you guys, I’m going to give you peek at the class that Gretta and I took at The Pump Station in LA – click on the video above to check it out! And I’m going to get back to Gretta and the baby now!

-Ricky

Of course, everyone knows that Judah Friedlander can beat up anybody, but find out three more things you didn't know about the 30 Rock star in this web exclusive!

Shirt by Theory, skirt by DKNY, necklace by Marlyn Schiff, tights by Fogal, shoes by Elizabeth & James available at Saks.

Shirt & shoes by DKNY, skirt by Helmut Lang, necklace by Suzanna Dai, tights by Fogal, belt by Diane Von Furstenberg.

Get to know the queen of the Kardashians as she shares three things you don't know about her!