Cindy Crawford, Elton John, Beyonce, Ray Charles, Britney Spears, and David Beckham have all done Pepsi ads. And everyone from Marilyn Monroe (in 1953) to Selena Gomez has flacked for Coke.

But they aren't doing their fans any favors. In fact, you could argue they're pushing their fans to get sick.

Around 63% of Americans down a sugar-sweetened beverage daily. And for the 35 million people with Type 2 diabetes, it's an even greater health risk than it is for healthy people.

A study published in BMJ looked at more than 15,000 people with Type 2 diabetes over the span of 18.5 years and found that those who drank the most sugar-sweetened beverages were 125% to 129% more likely to develop cardiovascular disease and to die from it, and 120% more likely to die from all other causes, than those who rarely or never drank them.

On the other hand, regularly drinking coffee, tea, and plain water reduced those risks.

In addition, people who increased their coffee consumption after diagnosis of Type 2 diabetes were especially protected from cardiovascular disease and mortality risks.

For the estimated 96 million U.S. adults who have prediabetes, sugar-sweetened beverages are also a threat. A study by Tufts University found that people who had six-plus servings a week were at a 46% higher risk of prediabetes.

Another study of Hispanic/Latino adults found that drinking 16 ounces a day upped the risk of going from prediabetes to full-blown diabetes by 75%.

The bottom line: Drinking only coffee, tea, and water keeps you younger and healthier.