Shirt by Isabel Marant, skirt by Elie Tahari, necklace by 4/24 by Gurhan, bracelet by jules, shoes by Stella McCartney.

Dress by 3.1 Philip Lim, necklace by Camilla James, shoes by Elizabeth and James available at Saks.

Dress by Isabel Marant, belt by Michael Kors, necklace and bracelet by Jules, shoes by Stella McCartney.

Dress by Rachel Rachel Roy, necklace by Double Happiness, shoes by Elizabeth and James, available at Saks Fifth Avenue.

Dress by Isabel Marant, necklace by Nashelle, shoes by Stella McCartney.

Dress & Belt by Kay Unger, necklace by Winifred Grace, bracelet by Stephen Webster, tight by Fogal, shoes by Prada.

Can Christina push through more obstacles to reach her goal? She's facing more of the emotional roadblocks to the success of her diet and hits the scales for her first weigh-in of the new year!

Want to follow along with her diet? Click here for Dr. Ian's customized eating plan for Christina!

They're the object of many a school girl crush, but which celebrities do the guys from Allstar Weekend like?

Sweater by La Rok, tank by Only Hearts, necklace by Winifred Grace, skirt by DKNY, tight by Wolford, shoes by Prada.

The students enjoy a surprise announcement from Rachael and Zappos.com, and start shopping for the unexpected and much-appreciated hats, coats, gym equipment and more!

Shirt by Elie Tahari, skirt by Sport Max, necklace by Winifred Grace,bracelet by Stephen Webster, tight by Fogal, shoes by Max Mara.

Tiffani Thiessen is in the Green Room sharing three things you may not know about her!

Dress by Diane Von Furstenberg, belt by B-low the Belt, bracelet by Stephen Webster, tight by Fogal, shoes by Stella McCartney.

Shirt by Elie Tahari, skirt by Sport Max, necklace by Winifred Grace, tight by Fogal, shoes by Max Mara.

Zappos.com continues its "Help for the Holidays" by giving some students a special surprise they will never forget!

Dr. Charles Sophy helps Christina confront her parents about the situations at home that are upsetting her and possibly getting in the way of her diet. Tune in for more, including her weekly weigh in!

Christina has a teary-eyed chat with Dr. Charles Sophy, who helps the teen face the emotional road blocks that are slowing her down on her quest to Lose 70 Pounds by Prom!

Dress by Diane Von Furstenberg, scarf is belt from the dress, bracelet by Presh, shoes by Max Mara.

Shirt by Equiptment available at www.intermixonline.com, skirt by Yigal Azrouel, necklace by Winifred Grace, ring by Alexis Bittar, tight by Fogal, shoes by Elizabeth & James available at saks.

Dress & belt by Kay Unger, necklace by Winifred Grace, tight by Fogal, shoes by Prada.

Shirt and skirt by Elie Tahari, necklace available at Jessie James, shoes by Stella McCartney.

Shirt by Majestic, skirt by Helmut Lang, belt by B-low the Belt, bracelet by Marlyn Schiff, shoes by Max Mara.

Rachael invites Christina and her dad back to the studio for some tough love with Dr. Ian and asks them to re-commit to the plan! Will they get back on track? Find out and offer your own words of encouragement for the teen!

Plus, check out Dr. Ian's personalized eating plan for Christina!

Dress by McQ by Alexander McQueen available at atriumnyc.com, necklace by Winifred Grace, tights by Fogal, shoes by Stella McCartney.

As Christina falters in her journey to get in shape, Rachael checks in with the teen's trainer, Jennifer Giamo, who has designed an entire workout for Christina in her quest to lose 70 Pounds by Prom. Click here to see that plan and to see Jenn demonstrate all of those exercises!

Nearly a week after getting a pep talk from Rachael and Dr. Ian, Christina heads back to the scale to check her progress. Is she back on track?

Our audience gets a big surprise from Zappos.com - and there might even be a little something for you! Click here to find out how you can become a Zappos.com VIP for FREE and get GUARANTEED FREE OVERNIGHT SHIPPING on every order you place!

Dress by Diane von Furstenberg, necklace by Double Happiness, tights by Fogal, shoes by Stella McCartney.

Find out the holiday tradition that has Julia Stiles trying her hand at fortune telling once a year!

Top by Pink Tartan, skirt by Derek Lam, necklace by Jules, shoes by Elizabeth and James available at Saks.

What naughty thing did The Daily Show's Samantha Bee used to do in her youth? Find out when she reveals three things you don't know about her!

Dress by Diane von Furstenberg, scarf (original belt from dress), bracelet by Presh, tights by Fogal, shoes by Max Mara.

Shirt by Majestic, skirt by Helmut Lang, belt by DKNY, tights by Fogal, shoes by Max Mara.

Two fashion victims get much-needed help for the holidays when Kyan Douglas pulls off makeovers right in Times Square! Click on the video to see the dramatic transformations, and find out how to get their looks for yourself below!

Lauretta's New Outfit:
Dress: Michael Michael Kors Buckle Waist Dress
Shoes: Stuart Weitzman Kilgore
Bag: Kathy Van Zeeland Shimmer Me Top Zip Tote
Ring: Judith Jack Lustre Onyx Large Stone Ring
Bracelet: Fossil Holiday Glam Stretch Bling Bracelet
Blazer: Kenneth Cole New York Ruched Sleeve Jacket

Geralyn's New Outfit:
Leggings: Three Dots Seamless Jersey Cropped Leggings
Dress: Laundry by Shelli Segal Long Sleeve Dot Mesh Dress
Tank Top: Cosabella Smooth Spaghetti Strap Camisole
Boots: Paul Green Fauna
Earrings: Judith Jack Lustre Onyx 4 Stone Earrings
Bracelet: Guess Bangle
Bag: BCBGeneration Molly Clutch

Shirt by DKNY, skirt by Burberry, necklace by A.V. Max, tights by Fogal, shoes by Max Mara.

David Hasselhoff's "hoffspring" Taylor-Ann and Hayley share three things you may not know about their dad!

Rachael spices up Christina's diet by teaching the teen how to prep low-cal versions of one of her favorite Italian dishes - Smoky Roasted Eggplant Marinara with Spaghetti Squash or Whole Wheat Spaghetti!

Click here to check out Christina's eating plan.

Dress by Philosophy Di Alberta Ferretti from Net-A-Porter, necklace by Naked Label, tights by Fogal, shoes by Stella McCartney.

Rachael puts one of America's most trusted holiday shopping sources to the test! Watch the video above to see if a Zappos.com customer service whiz solves her gift-giving dilemmas!

He's a star on the hit series The Vampire Diaries, but how did Paul Wesley get started in his career? Find out about his first job and more as he shares 3 things you don't know about him!

What would Blue Bloods' star Donnie Wahlberg request as a last meal? Find out when he reveals some of his favorite foods!

Dress by Laundry by Shelli Segal, necklace by Camilla James, shoes by DKNY.