The singer revealed her dramatic weight loss came after doctors ordered her to get fit when they discovered she had a heart murmur. She shed 19lbs and dropped from a size 12 to an eight in six weeks.
She told a magazine: "I make sure I work out three times a week now, and I don't hold back. It's a hardcore routine and I'm usually in the gym for at least an hour-and-a-half. I just like being more toned, it has made me really happy and I know I will never be super skinny because I would never be happy."
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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