The concoction was introduced to the 25-year-old singer as a joke by her junkie pal, Babyshambles guitarist 'Mik Whitnall', after she bought a 700 pound candy floss machine.
The singer, apparently, thought it was hilarious and has made the 'coke 'n candy special' a party piece at her house.
"It was Mik's idea. The candy floss machine was Amy's pride and joy and he thought it would be funny to give it a boost," News of the World quoted a pal, as saying.
"He and some pals sprinkled a wrap of coke into the mixture and Amy started eating it before she realized what they'd done. She now thinks it's a hoot to do the same," the pal added.