Jonathan Antoine – 56lb – Consistent Exercise Routine & Strict Diet Program

For singing duo Jonathan and Charlotte, competing in Britain’s Got Talent didn’t just provide a chance at achieving greatness. As far as Jonathan Antoine is concerned, the show saved his life! Battling with chronic weight loss issues, the up-and-coming artist credits the show with giving him incentive not only to lose weight but also to deal with his depression (caused by a long history of bullying and self-harm). After his best friend Charlotte convinced him to take the big step and audition, his life – and his bank account – took a turn for the better. Who knew that a reality TV show could count as effective depression treatment?

Mariah Carey – 45lbs – Strict Diet & Intense Exercise Routines

Speaking of Randy Jackson, one of his most successful collaborations was with 47-year-old Mariah Carey. Joining the ranks as one of the best-selling female artists of the new millennium, Carey released her first single—Vision of Love—in 1990 and saw her debut album fly off the shelves. Following up the hit with another four chart-topping singles, Carey has spent the last 28 years enjoying ongoing success with 18 chart-topping hits like One Sweet Day and We Belong Together.

After marrying Nick Cannon in 2008, Carey gave birth to twins in 2011 and was welcomed to motherhood with two precious babies and 70 pounds of baby weight that made her barely recognizable. Luckily, within a few months of giving birth, Carey dropped 45 pounds and had continued to shed the weight thanks to diet and exercise. Even after separating from Cannon in 2014 and packing on a few more pounds, Carey is still rocking a killer bod as she films her E! Network documentary series Mariah’s World which is set to premiere in June 2016!

Kelly Osbourne – 50lb – Dancing Routines & Healthy Diet Plan

It wasn’t until 2002 with the debut of The Osbournes when the world finally got to meet Kelly Osbourne, the daughter of the rock icon and the Godfather of Heavy Metal himself—Ozzy Osbourne. Following the mumbling singer and his strange profanity-loving family around, audiences were shocked by the foul-mouthed Kelly who received much unwanted attention because of her weight. Everything changed in 2009, however, when the wild-haired British fashion designer was added to the roster of Dancing with the Stars. Taking third place in the competition and losing the mirror-ball trophy to Donny Osmond, Osbourne had an even bigger victory when she dropped a whopping 50 pounds over the course of the show. Spending nearly ten weeks training and dancing with her professional partner Louis Van Amstel, Osbourne cut out junk food completely and looked like an entirely different person by the finale in November. The 31-year-old Brit has maintained her hot new look by eating healthy and staying active with a few spins on the dance floor every now and again.

Christina Aguilera – 47lbs – Possible Diet & Cosmetic Surgery

The princess of pop Christina Aguilera has an incredible voice, and we just love her music. After giving birth to her second child, it was a real challenge for her to lose the extra weight that she had gained. At that time Aguilera was at almost  200 pounds. She suddenly came back all skinny again after taking a short break from The Voice. We are unsure how she lost all that extra pounds so quickly? Maybe Liposuction?