Although many Americans can't start their day without a cup of coffee or tea, die-hard fans of diet sodas claim there's no substitute.
Elton John, Victoria Beckham and even former president Bill Clinton admit to being hooked on Diet Coke, and they're not alone.
For many, diet sodas fulfill a craving for sweets while giving drinkers a jolt of caffeine with few or zero calories.
Amanda Sanchez, a 29-year-old working mother of two, is a self-professed Diet Coke junkie.
"It's my water. It...Full Story