Many a star has jumped on the treadmill and lost those few pesky pounds over the years, but there have been a number of additions to the list of shriking celebrities of late, starting with Jennifer Hudson.
The singer has shed more than 80 pounds in the last couple of years, despite having a baby and tragically losing her mother, brother and nephew.
We take a look at some other stars who have recently transformed themselves...
Tools designed to ensure computer code in smart cars does not crash has been inspired by hungry penguins.
The rounded sleeping capsules send guests drifting into ocean before arriving on desert island by morning.
Sitting on the saddle activates the part of the brain responsible for learning, a study has claimed.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.
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