Tim Gunn and Ken Paves work makeover magic in fan favorite 'Biggest Loser' episode Jan. 21

Transformations and emotional reunions with loved ones highlight episode

It's time for one of the most eagerly anticipated episodes of "The Biggest Loser": the fan favorite makeover episode. Emmy Award-winning fashion expert Tim Gunn and Hollywood's hottest hairstylist, Ken Paves, return to "The Biggest Loser" to help give the seven remaining contestants transformations before they reunite with loved ones on a new episode airing Tuesday, Jan. 21 (8 p.m.), on NBC.

The fun begins with the contestants meeting Gunn and Paves at a trendy boutique. After Paves heads to his salon to get things ready for their arrival, Gunn works his magic, getting to know the players one by one, and helping each one select stylish new outfits to flatter their new, slimmer selves. For the contestants, it's a milestone moment in their weight-loss journey, seeing firsthand the extraordinary results of all of their hard work from the past 13 weeks.

Then the players are off to visit the Beverly Hills salon of Paves, whose clients have included Jennifer Lopez, Victoria Beckham, Lady GaGa and Eva Longoria. There, he crafts new looks for each of the remaining seven contestants, leading to dramatic transformations. Then they are whisked away to enjoy a special night out and very emotional reunions with loved ones flown in to celebrate their big day.

Later, it's back to reality and the ranch, for a last chance workout to get ready for their "makeover week" weigh-in, known for its notoriously low numbers. And with only one week left at the ranch, two people will fall below the dreaded red line this week, revealing the final five contestants of season 15.

"The Biggest Loser" fans can visit NBC.com's official show site, http://www.nbc.com/the-biggest-loser/, and "Like" the show on Facebook at https://www.facebook.com/biggestloser and on Twitter at http://twitter.com/biggestlosernbc.