Christina Aguilera
One year after flaunting her curves at the American Music Awards' red carpet in a purple Pamela Roland dress, the singer showed off a newly slimmed down figure in a white gown at the awards show.
Jason Segal
The How I Met Your Mother star shed the pounds for his role in the upcoming film, Sex Tape.
Kim Kardashian
After rumors surfaced that she had turned to plastic surgery to transform her post-body, the new mom took to Twitter to set the record straight. "I worked so hard to train myself to eat right & healthy, I worked out so hard & this was such a challenge for me but I did it!!! I'm so proud of my accomplishment & NO ONE will take this away from me with fake reports!"
Jessica Simpson
Bye-bye, baby weight! After giving birth to her second child in June, the Weight Watchers spokesperson looks fabulously fit.
Chris Pratt
Yowza! The Parks and Recreatiion star picked up a six-pack for his role in the upcoming Guardians of the Galaxy. We'd definitely file his new bod under job perks.
Kate Middleton
Just one month after giving birth to Prince George, the ravishing royal bounced back to her pre-baby body. The new mom reportedly snacked on muesli bars and drank smoothies in an effort to regain her figure.
Miranda Lambert
Blake Shelton's wife stole the spotlight at the CMA Awards when she debuted a noticeably leaner frame.
Chris Daughtry
Now that's what we call a selfie! The rocker showed off his newly rock-hard form and explained his physical transformation took a lot of "hard work and commitment" via his Twitter account.
Chaz Bono
During an appearance on The Doctors, Cher's son admitted he felt "more confident" after losing 65 pounds.
Lisa Lampanelli
This is no joking matter! The comedian lost a whopping 106 pounds after having gastric-sleeve surgery.