Celebrity Body

Selena Gomez shared an Instagram of herself practicing yoga in teeny tiny booty shorts -- see her butt cheek-baring look here

Then and wow! Click through to dramatic weight loss makeovers from the top 6 contestants on season 16 of The Biggest Loser. You won't believe their before and after shots!

Mark Wahlberg's wife Rhea is proud of her husband -- the actor's love gushed over his 1992 Calvin Klein ad following Justin Bieber's take

On the Jan. 8 episode of The Biggest Loser, Scott Mitchell reveals his weight loss to his family in a tearful reunion -- watch the exclusive clip!

Little House on the Prairie star Melissa Gilbert blogged about her decision to remove her breast implants -- see her reasoning

See a shirtless and sweaty photo of season 19 Bachelor Chris Soules!

Ben Affleck showed off his ripped physique in a tight T-shirt on Jan. 6 -- see his impressive biceps!

Kristen Stewart showed off her toned figure in a pair of super-short shorts and a tank top while on the beach in Hawaii with pal Alicia Cargile -- see the pictures

British actor Timothy Spall showed off a much slimmer frame while attending the New York Film Critics Circle Awards on Monday, Jan. 5 -- see the before-and-after pics!

Boost your workout -- and fulfill your New Year's resolution -- with the ultimate gym playlist for 2015, created just for Us Weekly from the fitness-minded pros at Crunch. Find out which tunes to download here!

Teen Mom alum Farrah Abraham posted pictures of her shocking, botched lip injections -- see the unsettling images

British singer FKA twigs stripped down for V magazine's Spring 2015 preview -- see her nearly naked cover photo

Tara Reid has come under fire from fans on Instagram who are accusing her of Photoshopping her countless bikini snaps — see the photos here and decide for yourself

Bradley Cooper went bold, stripping nude for the new movie issue of W magazine -- see the steamy photos!

Brooke Shields looked better than ever in a green bikini while on vacation in Mexico -- see her stunning body at age 49 here

Anna Kaiser, trainer to stars like Sofia Vergara, Kelly Ripa, and Sarah Jessica Parker, reveals exclusively to Us Weekly how to sculpt your arms in just three easy moves -- watch

Former Pussycat Dolls singer Nicole Scherzinger admitted to Cosmopolitan Body magazine that her weight fluctuates and working out is like "pulling teeth" -- read her honest quotes here

Sonya Jones, a season 16 Biggest Loser contestant, has dropped more than 100 pounds -- watch her emotional makeover reveal and see her Us Weekly photo shoot here!

Kylie Jenner shared her own sexy, skinny abs photo on New Year's day, following in sister Kendall's footsteps

Kendall Jenner showed off her incredible bikini body via Instagram on Wednesday, Dec. 31 -- see the Instagram photo!