These celebs have all undergone drastic changes to their appearance. Some have gained or lost weight for a movie role, while others have personally struggled to maintain a red-carpet-ready physique. What are some of the most shocking celebrity weight changes in recent memory? Click ‘Next’ to find out.

 Christina Aguilera

When Christina Aguilera dropped 35 pounds in 2013, the singer was furious at rumors she had liposuction. Not so said the star, with pals insisting the change was due to hard work, in the form of diet and exercise. A friend told Life and Style [via Hollywood Life], that the hit-maker is “sick and tired of people assuming things about her body.”