Biggest Loser winner Rachel Frederickson's shocking 155-pound weight loss dominated the news on Wednesday, Feb. 5. Credit: Trae Patton/NBC

Former professional swimmer Rachel Frederickson not only shocked viewers of The Biggest Loser, but she also left trainers Jillian Michaels and Bob Harper speechless when she debuted her 155-pound weight loss in the show's finale. She went from a size 20 to a size 0/2! See the Top 5 Stories:

Whoa. Rachel Frederickson was the season 15 winner of the Biggest Loser -- losing a record-breaking 59.62 percent of her total body weight. Shrinking down from 260 pounds to just 105 pounds, the former high school swimmer, 24, looked utterly unrecognizable at the final weigh-in. Frederickson, who beat out fellow finalists David Brown and Bobby Saleem, won the grand prize of $250,000, and was ecstatic speaking with Us Weekly about her transformation.

Was Rachel Frederickson's big reveal the, er, biggest in Biggest Loser history? Personal trainers Jillian Michaels and Bob Harper have seen some incredible transformations over the years, but even they were flabbergasted by Frederickson's 155-pound weight loss on the show's season 15 finale on Tuesday, Feb. 4.

Shortly before Justin Bieber was in jail, his ex Selena Gomez was in rehab. The 21-year-old "Come & Get It" singer secretly entered a rehab facility in January, Us Weekly confirms.

Proud papa! Kevin Jonas may have been excited to live tweet the birth of his first child, but he looked like he was in pure heaven when he got to hold her for the very first time. Dreft laundry detergent, which announced the birth of his and wife Danielle's baby girl on Feb 2, shared the first photo of the father-daughter duo on Wednesday, Feb. 5.

Diva in training! Although she's had plenty of engagements lately, from her sexy "Drunk in Love" Grammys opener with hubby Jay Z to a surprising gig at a pre-Super Bowl party with yet another show-stopping version of the hit, Beyonce continues to make time for her 2-year-old daughter Blue Ivy Carter