The singer, 38, previously touched on his eating habits, revealing he had adopted the 6:1 diet, which encourages followers to skip food once every seven days and only drink water.

"I started to miss a day of food once a week and at first I thought, 'This is crazy!'," he told U.S. talk show host Ellen DeGeneres in December (15). "And then I found that it made me really grateful for food and life in general."

Now, as Coldplay prepare to headline the Super Bowl half-time show in Santa Clara, California on 7 February (16), Chris has shed a little more light on the other benefits of his dietary change.

"Creativity is one of the benefits of it," he tells New York radio station Fresh 102.7. "I started doing it because I was sick one time, and this guy said to me, 'Just try not eating for a day, 'cause it will make your body feel healthier'.

"I did it and then I found that I could sing a bit better and also I felt so grateful for food, and very grateful for everything in a way that I wasn't so much before. I think that the feeling of gratitude naturally brings out a joyous feeling, and when you are hungry you are very focused, so both sides of it help creativity."

However, Chris admits his fasting sometimes has a negative impact on his behaviour: "If you fast for a while, about 15 hours in, you get a little antsy, so you've gotta be careful who you're talking to at that point!"

And he confesses to struggling to eat healthily when he starts feasting again after his fast day.

"I tend to have Nutella (chocolate hazelnut spread) and pancakes, which is terrible and completely defeats the point!" he laughs.

Chris' estranged wife, Gwyneth Paltrow, is also known for her strict diet after previously embracing a macrobiotic lifestyle, but she quit the strict nutrition plan after becoming a mum to the former couple's two children, 11-year-old Apple and nine-year-old Moses.